Calculus Examples

$\frac{d y}{d x} = 4 x^{4} \sqrt{y}$

Step 1

Separate the variables.

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Step 1.1

Multiply both sides by $\frac{1}{\sqrt{y}}$ .

$\frac{1}{\sqrt{y}} \frac{d y}{d x} = \frac{1}{\sqrt{y}} (4 x^{4} \sqrt{y})$

Step 1.2

Simplify.

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Step 1.2.1

Rewrite using the commutative property of multiplication.

$\frac{1}{\sqrt{y}} \frac{d y}{d x} = 4 \frac{1}{\sqrt{y}} (x^{4} \sqrt{y})$

Step 1.2.2

Multiply $\frac{1}{\sqrt{y}}$ by $\frac{\sqrt{y}}{\sqrt{y}}$ .

$\frac{1}{\sqrt{y}} \frac{d y}{d x} = 4 (\frac{1}{\sqrt{y}} \cdot \frac{\sqrt{y}}{\sqrt{y}}) (x^{4} \sqrt{y})$

Step 1.2.3

Combine and simplify the denominator.

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Step 1.2.3.1

Multiply $\frac{1}{\sqrt{y}}$ by $\frac{\sqrt{y}}{\sqrt{y}}$ .

$\frac{1}{\sqrt{y}} \frac{d y}{d x} = 4 \frac{\sqrt{y}}{\sqrt{y} \sqrt{y}} (x^{4} \sqrt{y})$

Step 1.2.3.2

Raise $\sqrt{y}$ to the power of $1$ .

$\frac{1}{\sqrt{y}} \frac{d y}{d x} = 4 \frac{\sqrt{y}}{{\sqrt{y}}^{1} \sqrt{y}} (x^{4} \sqrt{y})$

Step 1.2.3.3

Raise $\sqrt{y}$ to the power of $1$ .

$\frac{1}{\sqrt{y}} \frac{d y}{d x} = 4 \frac{\sqrt{y}}{{\sqrt{y}}^{1} {\sqrt{y}}^{1}} (x^{4} \sqrt{y})$

Step 1.2.3.4

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$\frac{1}{\sqrt{y}} \frac{d y}{d x} = 4 \frac{\sqrt{y}}{{\sqrt{y}}^{1 + 1}} (x^{4} \sqrt{y})$

Step 1.2.3.5

Add $1$ and $1$ .

$\frac{1}{\sqrt{y}} \frac{d y}{d x} = 4 \frac{\sqrt{y}}{{\sqrt{y}}^{2}} (x^{4} \sqrt{y})$

Step 1.2.3.6

Rewrite ${\sqrt{y}}^{2}$ as $y$ .

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Step 1.2.3.6.1

Use $\sqrt[n]{a^{x}} = a^{\frac{x}{n}}$ to rewrite $\sqrt{y}$ as $y^{\frac{1}{2}}$ .

$\frac{1}{\sqrt{y}} \frac{d y}{d x} = 4 \frac{\sqrt{y}}{{(y^{\frac{1}{2}})}^{2}} (x^{4} \sqrt{y})$

Step 1.2.3.6.2

Apply the power rule and multiply exponents, ${(a^{m})}^{n} = a^{m n}$ .

$\frac{1}{\sqrt{y}} \frac{d y}{d x} = 4 \frac{\sqrt{y}}{y^{\frac{1}{2} \cdot 2}} (x^{4} \sqrt{y})$

Step 1.2.3.6.3

Combine $\frac{1}{2}$ and $2$ .

$\frac{1}{\sqrt{y}} \frac{d y}{d x} = 4 \frac{\sqrt{y}}{y^{\frac{2}{2}}} (x^{4} \sqrt{y})$

Step 1.2.3.6.4

Cancel the common factor of $2$ .

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Step 1.2.3.6.4.1

Cancel the common factor.

$\frac{1}{\sqrt{y}} \frac{d y}{d x} = 4 \frac{\sqrt{y}}{y^{\frac{2}{2}}} (x^{4} \sqrt{y})$

Step 1.2.3.6.4.2

Rewrite the expression.

$\frac{1}{\sqrt{y}} \frac{d y}{d x} = 4 \frac{\sqrt{y}}{y^{1}} (x^{4} \sqrt{y})$

Step 1.2.3.6.5

Simplify.

$\frac{1}{\sqrt{y}} \frac{d y}{d x} = 4 \frac{\sqrt{y}}{y} (x^{4} \sqrt{y})$

Step 1.2.4

Combine $4$ and $\frac{\sqrt{y}}{y}$ .

$\frac{1}{\sqrt{y}} \frac{d y}{d x} = \frac{4 \sqrt{y}}{y} (x^{4} \sqrt{y})$

Step 1.2.5

Multiply $\frac{4 \sqrt{y}}{y} (x^{4} \sqrt{y})$ .

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Step 1.2.5.1

Combine $x^{4}$ and $\frac{4 \sqrt{y}}{y}$ .

$\frac{1}{\sqrt{y}} \frac{d y}{d x} = \frac{x^{4} (4 \sqrt{y})}{y} \sqrt{y}$

Step 1.2.5.2

Combine $\frac{x^{4} (4 \sqrt{y})}{y}$ and $\sqrt{y}$ .

$\frac{1}{\sqrt{y}} \frac{d y}{d x} = \frac{x^{4} (4 \sqrt{y}) \sqrt{y}}{y}$

Step 1.2.5.3

Raise $\sqrt{y}$ to the power of $1$ .

$\frac{1}{\sqrt{y}} \frac{d y}{d x} = \frac{x^{4} (4 ({\sqrt{y}}^{1} \sqrt{y}))}{y}$

Step 1.2.5.4

Raise $\sqrt{y}$ to the power of $1$ .

$\frac{1}{\sqrt{y}} \frac{d y}{d x} = \frac{x^{4} (4 ({\sqrt{y}}^{1} {\sqrt{y}}^{1}))}{y}$

Step 1.2.5.5

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$\frac{1}{\sqrt{y}} \frac{d y}{d x} = \frac{x^{4} (4 {\sqrt{y}}^{1 + 1})}{y}$

Step 1.2.5.6

Add $1$ and $1$ .

$\frac{1}{\sqrt{y}} \frac{d y}{d x} = \frac{x^{4} (4 {\sqrt{y}}^{2})}{y}$

Step 1.2.6

Rewrite ${\sqrt{y}}^{2}$ as $y$ .

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Step 1.2.6.1

Use $\sqrt[n]{a^{x}} = a^{\frac{x}{n}}$ to rewrite $\sqrt{y}$ as $y^{\frac{1}{2}}$ .

$\frac{1}{\sqrt{y}} \frac{d y}{d x} = \frac{x^{4} \cdot 4 {(y^{\frac{1}{2}})}^{2}}{y}$

Step 1.2.6.2

Apply the power rule and multiply exponents, ${(a^{m})}^{n} = a^{m n}$ .

$\frac{1}{\sqrt{y}} \frac{d y}{d x} = \frac{x^{4} \cdot 4 y^{\frac{1}{2} \cdot 2}}{y}$

Step 1.2.6.3

Combine $\frac{1}{2}$ and $2$ .

$\frac{1}{\sqrt{y}} \frac{d y}{d x} = \frac{x^{4} \cdot 4 y^{\frac{2}{2}}}{y}$

Step 1.2.6.4

Cancel the common factor of $2$ .

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Step 1.2.6.4.1

Cancel the common factor.

$\frac{1}{\sqrt{y}} \frac{d y}{d x} = \frac{x^{4} \cdot 4 y^{\frac{2}{2}}}{y}$

Step 1.2.6.4.2

Rewrite the expression.

$\frac{1}{\sqrt{y}} \frac{d y}{d x} = \frac{x^{4} \cdot 4 y^{1}}{y}$

Step 1.2.6.5

Simplify.

$\frac{1}{\sqrt{y}} \frac{d y}{d x} = \frac{x^{4} \cdot 4 y}{y}$

Step 1.2.7

Cancel the common factor of $y$ .

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Step 1.2.7.1

Cancel the common factor.

$\frac{1}{\sqrt{y}} \frac{d y}{d x} = \frac{x^{4} \cdot 4 y}{y}$

Step 1.2.7.2

Divide $x^{4} \cdot 4$ by $1$ .

$\frac{1}{\sqrt{y}} \frac{d y}{d x} = x^{4} \cdot 4$

Step 1.2.8

Move $4$ to the left of $x^{4}$ .

$\frac{1}{\sqrt{y}} \frac{d y}{d x} = 4 x^{4}$

Step 1.3

Rewrite the equation.

$\frac{1}{\sqrt{y}} d y = 4 x^{4} d x$

Step 2

Integrate both sides.

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Step 2.1

Set up an integral on each side.

$\int \frac{1}{\sqrt{y}} d y = \int 4 x^{4} d x$

Step 2.2

Integrate the left side.

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Step 2.2.1

Apply basic rules of exponents.

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Step 2.2.1.1

Use $\sqrt[n]{a^{x}} = a^{\frac{x}{n}}$ to rewrite $\sqrt{y}$ as $y^{\frac{1}{2}}$ .

$\int \frac{1}{y^{\frac{1}{2}}} d y = \int 4 x^{4} d x$

Step 2.2.1.2

Move $y^{\frac{1}{2}}$ out of the denominator by raising it to the $- 1$ power.

$\int {(y^{\frac{1}{2}})}^{- 1} d y = \int 4 x^{4} d x$

Step 2.2.1.3

Multiply the exponents in ${(y^{\frac{1}{2}})}^{- 1}$ .

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Step 2.2.1.3.1

Apply the power rule and multiply exponents, ${(a^{m})}^{n} = a^{m n}$ .

$\int y^{\frac{1}{2} \cdot - 1} d y = \int 4 x^{4} d x$

Step 2.2.1.3.2

Combine $\frac{1}{2}$ and $- 1$ .

$\int y^{\frac{- 1}{2}} d y = \int 4 x^{4} d x$

Step 2.2.1.3.3

Move the negative in front of the fraction.

$\int y^{- \frac{1}{2}} d y = \int 4 x^{4} d x$

Step 2.2.2

By the Power Rule, the integral of $y^{- \frac{1}{2}}$ with respect to $y$ is $2 y^{\frac{1}{2}}$ .

$2 y^{\frac{1}{2}} + C_{1} = \int 4 x^{4} d x$

Step 2.3

Integrate the right side.

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Step 2.3.1

Since $4$ is constant with respect to $x$ , move $4$ out of the integral.

$2 y^{\frac{1}{2}} + C_{1} = 4 \int x^{4} d x$

Step 2.3.2

By the Power Rule, the integral of $x^{4}$ with respect to $x$ is $\frac{1}{5} x^{5}$ .

$2 y^{\frac{1}{2}} + C_{1} = 4 (\frac{1}{5} x^{5} + C_{2})$

Step 2.3.3

Simplify the answer.

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Step 2.3.3.1

Rewrite $4 (\frac{1}{5} x^{5} + C_{2})$ as $4 (\frac{1}{5}) x^{5} + C_{2}$ .

$2 y^{\frac{1}{2}} + C_{1} = 4 (\frac{1}{5}) x^{5} + C_{2}$

Step 2.3.3.2

Combine $4$ and $\frac{1}{5}$ .

$2 y^{\frac{1}{2}} + C_{1} = \frac{4}{5} x^{5} + C_{2}$

Step 2.4

Group the constant of integration on the right side as $K$ .

$2 y^{\frac{1}{2}} = \frac{4}{5} x^{5} + K$

Step 3

Solve for $y$ .

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Step 3.1

Divide each term in $2 y^{\frac{1}{2}} = \frac{4}{5} x^{5} + K$ by $2$ and simplify.

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Step 3.1.1

Divide each term in $2 y^{\frac{1}{2}} = \frac{4}{5} x^{5} + K$ by $2$ .

$\frac{2 y^{\frac{1}{2}}}{2} = \frac{\frac{4}{5} x^{5}}{2} + \frac{K}{2}$

Step 3.1.2

Simplify the left side.

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Step 3.1.2.1

Cancel the common factor.

$\frac{2 y^{\frac{1}{2}}}{2} = \frac{\frac{4}{5} x^{5}}{2} + \frac{K}{2}$

Step 3.1.2.2

Divide $y^{\frac{1}{2}}$ by $1$ .

$y^{\frac{1}{2}} = \frac{\frac{4}{5} x^{5}}{2} + \frac{K}{2}$

Step 3.1.3

Simplify the right side.

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Step 3.1.3.1

Simplify each term.

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Step 3.1.3.1.1

Combine $\frac{4}{5}$ and $x^{5}$ .

$y^{\frac{1}{2}} = \frac{\frac{4 x^{5}}{5}}{2} + \frac{K}{2}$

Step 3.1.3.1.2

Multiply the numerator by the reciprocal of the denominator.

$y^{\frac{1}{2}} = \frac{4 x^{5}}{5} \cdot \frac{1}{2} + \frac{K}{2}$

Step 3.1.3.1.3

Combine.

$y^{\frac{1}{2}} = \frac{4 x^{5} \cdot 1}{5 \cdot 2} + \frac{K}{2}$

Step 3.1.3.1.4

Cancel the common factor of $4$ and $2$ .

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Step 3.1.3.1.4.1

Factor $2$ out of $4 x^{5} \cdot 1$ .

$y^{\frac{1}{2}} = \frac{2 (2 x^{5} \cdot 1)}{5 \cdot 2} + \frac{K}{2}$

Step 3.1.3.1.4.2

Cancel the common factors.

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Step 3.1.3.1.4.2.1

Factor $2$ out of $5 \cdot 2$ .

$y^{\frac{1}{2}} = \frac{2 (2 x^{5} \cdot 1)}{2 \cdot 5} + \frac{K}{2}$

Step 3.1.3.1.4.2.2

Cancel the common factor.

$y^{\frac{1}{2}} = \frac{2 (2 x^{5} \cdot 1)}{2 \cdot 5} + \frac{K}{2}$

Step 3.1.3.1.4.2.3

Rewrite the expression.

$y^{\frac{1}{2}} = \frac{2 x^{5} \cdot 1}{5} + \frac{K}{2}$

Step 3.1.3.1.5

Multiply $2$ by $1$ .

$y^{\frac{1}{2}} = \frac{2 x^{5}}{5} + \frac{K}{2}$

Step 3.2

Raise each side of the equation to the power of $2$ to eliminate the fractional exponent on the left side.

${(y^{\frac{1}{2}})}^{2} = {(\frac{2 x^{5}}{5} + \frac{K}{2})}^{2}$

Step 3.3

Simplify the exponent.

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Step 3.3.1

Simplify the left side.

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Step 3.3.1.1

Simplify ${(y^{\frac{1}{2}})}^{2}$ .

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Step 3.3.1.1.1

Multiply the exponents in ${(y^{\frac{1}{2}})}^{2}$ .

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Step 3.3.1.1.1.1

Apply the power rule and multiply exponents, ${(a^{m})}^{n} = a^{m n}$ .

$y^{\frac{1}{2} \cdot 2} = {(\frac{2 x^{5}}{5} + \frac{K}{2})}^{2}$

Step 3.3.1.1.1.2

Cancel the common factor of $2$ .

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Step 3.3.1.1.1.2.1

Cancel the common factor.

$y^{\frac{1}{2} \cdot 2} = {(\frac{2 x^{5}}{5} + \frac{K}{2})}^{2}$

Step 3.3.1.1.1.2.2

Rewrite the expression.

$y^{1} = {(\frac{2 x^{5}}{5} + \frac{K}{2})}^{2}$

Step 3.3.1.1.2

Simplify.

$y = {(\frac{2 x^{5}}{5} + \frac{K}{2})}^{2}$

Step 3.3.2

Simplify the right side.

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Step 3.3.2.1

Simplify ${(\frac{2 x^{5}}{5} + \frac{K}{2})}^{2}$ .

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Step 3.3.2.1.1

Rewrite ${(\frac{2 x^{5}}{5} + \frac{K}{2})}^{2}$ as $(\frac{2 x^{5}}{5} + \frac{K}{2}) (\frac{2 x^{5}}{5} + \frac{K}{2})$ .

$y = (\frac{2 x^{5}}{5} + \frac{K}{2}) (\frac{2 x^{5}}{5} + \frac{K}{2})$

Step 3.3.2.1.2

Expand $(\frac{2 x^{5}}{5} + \frac{K}{2}) (\frac{2 x^{5}}{5} + \frac{K}{2})$ using the FOIL Method.

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Step 3.3.2.1.2.1

Apply the distributive property.

$y = \frac{2 x^{5}}{5} (\frac{2 x^{5}}{5} + \frac{K}{2}) + \frac{K}{2} (\frac{2 x^{5}}{5} + \frac{K}{2})$

Step 3.3.2.1.2.2

Apply the distributive property.

$y = \frac{2 x^{5}}{5} \cdot \frac{2 x^{5}}{5} + \frac{2 x^{5}}{5} \cdot \frac{K}{2} + \frac{K}{2} (\frac{2 x^{5}}{5} + \frac{K}{2})$

Step 3.3.2.1.2.3

Apply the distributive property.

$y = \frac{2 x^{5}}{5} \cdot \frac{2 x^{5}}{5} + \frac{2 x^{5}}{5} \cdot \frac{K}{2} + \frac{K}{2} \cdot \frac{2 x^{5}}{5} + \frac{K}{2} \cdot \frac{K}{2}$

Step 3.3.2.1.3

Simplify and combine like terms.

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Step 3.3.2.1.3.1

Simplify each term.

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Step 3.3.2.1.3.1.1

Combine.

$y = \frac{2 x^{5} (2 x^{5})}{5 \cdot 5} + \frac{2 x^{5}}{5} \cdot \frac{K}{2} + \frac{K}{2} \cdot \frac{2 x^{5}}{5} + \frac{K}{2} \cdot \frac{K}{2}$

Step 3.3.2.1.3.1.2

Multiply $x^{5}$ by $x^{5}$ by adding the exponents.

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Step 3.3.2.1.3.1.2.1

Move $x^{5}$ .

$y = \frac{2 (x^{5} x^{5}) \cdot 2}{5 \cdot 5} + \frac{2 x^{5}}{5} \cdot \frac{K}{2} + \frac{K}{2} \cdot \frac{2 x^{5}}{5} + \frac{K}{2} \cdot \frac{K}{2}$

Step 3.3.2.1.3.1.2.2

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$y = \frac{2 x^{5 + 5} \cdot 2}{5 \cdot 5} + \frac{2 x^{5}}{5} \cdot \frac{K}{2} + \frac{K}{2} \cdot \frac{2 x^{5}}{5} + \frac{K}{2} \cdot \frac{K}{2}$

Step 3.3.2.1.3.1.2.3

Add $5$ and $5$ .

$y = \frac{2 x^{10} \cdot 2}{5 \cdot 5} + \frac{2 x^{5}}{5} \cdot \frac{K}{2} + \frac{K}{2} \cdot \frac{2 x^{5}}{5} + \frac{K}{2} \cdot \frac{K}{2}$

Step 3.3.2.1.3.1.3

Multiply $2$ by $2$ .

$y = \frac{4 x^{10}}{5 \cdot 5} + \frac{2 x^{5}}{5} \cdot \frac{K}{2} + \frac{K}{2} \cdot \frac{2 x^{5}}{5} + \frac{K}{2} \cdot \frac{K}{2}$

Step 3.3.2.1.3.1.4

Multiply $5$ by $5$ .

$y = \frac{4 x^{10}}{25} + \frac{2 x^{5}}{5} \cdot \frac{K}{2} + \frac{K}{2} \cdot \frac{2 x^{5}}{5} + \frac{K}{2} \cdot \frac{K}{2}$

Step 3.3.2.1.3.1.5

Combine.

$y = \frac{4 x^{10}}{25} + \frac{2 x^{5} K}{5 \cdot 2} + \frac{K}{2} \cdot \frac{2 x^{5}}{5} + \frac{K}{2} \cdot \frac{K}{2}$

Step 3.3.2.1.3.1.6

Cancel the common factor of $2$ .

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Step 3.3.2.1.3.1.6.1

Cancel the common factor.

$y = \frac{4 x^{10}}{25} + \frac{2 x^{5} K}{5 \cdot 2} + \frac{K}{2} \cdot \frac{2 x^{5}}{5} + \frac{K}{2} \cdot \frac{K}{2}$

Step 3.3.2.1.3.1.6.2

Rewrite the expression.

$y = \frac{4 x^{10}}{25} + \frac{x^{5} K}{5} + \frac{K}{2} \cdot \frac{2 x^{5}}{5} + \frac{K}{2} \cdot \frac{K}{2}$

Step 3.3.2.1.3.1.7

Combine.

$y = \frac{4 x^{10}}{25} + \frac{x^{5} K}{5} + \frac{K (2 x^{5})}{2 \cdot 5} + \frac{K}{2} \cdot \frac{K}{2}$

Step 3.3.2.1.3.1.8

Cancel the common factor of $2$ .

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Step 3.3.2.1.3.1.8.1

Cancel the common factor.

$y = \frac{4 x^{10}}{25} + \frac{x^{5} K}{5} + \frac{K (2 x^{5})}{2 \cdot 5} + \frac{K}{2} \cdot \frac{K}{2}$

Step 3.3.2.1.3.1.8.2

Rewrite the expression.

$y = \frac{4 x^{10}}{25} + \frac{x^{5} K}{5} + \frac{K (x^{5})}{5} + \frac{K}{2} \cdot \frac{K}{2}$

Step 3.3.2.1.3.1.9

Multiply $\frac{K}{2} \cdot \frac{K}{2}$ .

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Step 3.3.2.1.3.1.9.1

Multiply $\frac{K}{2}$ by $\frac{K}{2}$ .

$y = \frac{4 x^{10}}{25} + \frac{x^{5} K}{5} + \frac{K x^{5}}{5} + \frac{K \cdot K}{2 \cdot 2}$

Step 3.3.2.1.3.1.9.2

Raise $K$ to the power of $1$ .

$y = \frac{4 x^{10}}{25} + \frac{x^{5} K}{5} + \frac{K x^{5}}{5} + \frac{K^{1} K}{2 \cdot 2}$

Step 3.3.2.1.3.1.9.3

Raise $K$ to the power of $1$ .

$y = \frac{4 x^{10}}{25} + \frac{x^{5} K}{5} + \frac{K x^{5}}{5} + \frac{K^{1} K^{1}}{2 \cdot 2}$

Step 3.3.2.1.3.1.9.4

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$y = \frac{4 x^{10}}{25} + \frac{x^{5} K}{5} + \frac{K x^{5}}{5} + \frac{K^{1 + 1}}{2 \cdot 2}$

Step 3.3.2.1.3.1.9.5

Add $1$ and $1$ .

$y = \frac{4 x^{10}}{25} + \frac{x^{5} K}{5} + \frac{K x^{5}}{5} + \frac{K^{2}}{2 \cdot 2}$

Step 3.3.2.1.3.1.9.6

Multiply $2$ by $2$ .

$y = \frac{4 x^{10}}{25} + \frac{x^{5} K}{5} + \frac{K x^{5}}{5} + \frac{K^{2}}{4}$

Step 3.3.2.1.3.2

Add $\frac{x^{5} K}{5}$ and $\frac{K x^{5}}{5}$ .

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Step 3.3.2.1.3.2.1

Reorder $x^{5}$ and $K$ .

$y = \frac{4 x^{10}}{25} + \frac{K x^{5}}{5} + \frac{K x^{5}}{5} + \frac{K^{2}}{4}$

Step 3.3.2.1.3.2.2

Add $\frac{K x^{5}}{5}$ and $\frac{K x^{5}}{5}$ .

$y = \frac{4 x^{10}}{25} + 2 \frac{K x^{5}}{5} + \frac{K^{2}}{4}$

Step 3.3.2.1.4

Combine $2$ and $\frac{K x^{5}}{5}$ .

$y = \frac{4 x^{10}}{25} + \frac{2 K x^{5}}{5} + \frac{K^{2}}{4}$

Step 4

Simplify the constant of integration.

$y = \frac{4 x^{10}}{25} + \frac{K x^{5}}{5} + K$