Calculus Examples

$lim_{x \to 2} \sqrt{\frac{5 x^{2} + 5}{9 x - 2}}$

Step 1

Move the limit under the radical sign.

$\sqrt{lim_{x \to 2} \frac{5 x^{2} + 5}{9 x - 2}}$

Step 2

Split the limit using the Limits Quotient Rule on the limit as $x$ approaches $2$ .

$\sqrt{\frac{lim_{x \to 2} 5 x^{2} + 5}{lim_{x \to 2} 9 x - 2}}$

Step 3

Split the limit using the Sum of Limits Rule on the limit as $x$ approaches $2$ .

$\sqrt{\frac{lim_{x \to 2} 5 x^{2} + lim_{x \to 2} 5}{lim_{x \to 2} 9 x - 2}}$

Step 4

Move the term $5$ outside of the limit because it is constant with respect to $x$ .

$\sqrt{\frac{5 lim_{x \to 2} x^{2} + lim_{x \to 2} 5}{lim_{x \to 2} 9 x - 2}}$

Step 5

Move the exponent $2$ from $x^{2}$ outside the limit using the Limits Power Rule.

$\sqrt{\frac{5 {(lim_{x \to 2} x)}^{2} + lim_{x \to 2} 5}{lim_{x \to 2} 9 x - 2}}$

Step 6

Evaluate the limit of $5$ which is constant as $x$ approaches $2$ .

$\sqrt{\frac{5 {(lim_{x \to 2} x)}^{2} + 5}{lim_{x \to 2} 9 x - 2}}$

Step 7

Split the limit using the Sum of Limits Rule on the limit as $x$ approaches $2$ .

$\sqrt{\frac{5 {(lim_{x \to 2} x)}^{2} + 5}{lim_{x \to 2} 9 x - lim_{x \to 2} 2}}$

Step 8

Move the term $9$ outside of the limit because it is constant with respect to $x$ .

$\sqrt{\frac{5 {(lim_{x \to 2} x)}^{2} + 5}{9 lim_{x \to 2} x - lim_{x \to 2} 2}}$

Step 9

Evaluate the limit of $2$ which is constant as $x$ approaches $2$ .

$\sqrt{\frac{5 {(lim_{x \to 2} x)}^{2} + 5}{9 lim_{x \to 2} x - 1 \cdot 2}}$

Step 10

Evaluate the limits by plugging in $2$ for all occurrences of $x$ .

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Step 10.1

Evaluate the limit of $x$ by plugging in $2$ for $x$ .

$\sqrt{\frac{5 \cdot 2^{2} + 5}{9 lim_{x \to 2} x - 1 \cdot 2}}$

Step 10.2

Evaluate the limit of $x$ by plugging in $2$ for $x$ .

$\sqrt{\frac{5 \cdot 2^{2} + 5}{9 \cdot 2 - 1 \cdot 2}}$

Step 11

Simplify the answer.

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Step 11.1

Raise $2$ to the power of $2$ .

$\sqrt{\frac{5 \cdot 4 + 5}{9 \cdot 2 - 1 \cdot 2}}$

Step 11.2

Multiply $5$ by $4$ .

$\sqrt{\frac{20 + 5}{9 \cdot 2 - 1 \cdot 2}}$

Step 11.3

Add $20$ and $5$ .

$\sqrt{\frac{25}{9 \cdot 2 - 1 \cdot 2}}$

Step 11.4

Multiply $9$ by $2$ .

$\sqrt{\frac{25}{18 - 1 \cdot 2}}$

Step 11.5

Multiply $- 1$ by $2$ .

$\sqrt{\frac{25}{18 - 2}}$

Step 11.6

Subtract $2$ from $18$ .

$\sqrt{\frac{25}{16}}$

Step 11.7

Rewrite $\sqrt{\frac{25}{16}}$ as $\frac{\sqrt{25}}{\sqrt{16}}$ .

$\frac{\sqrt{25}}{\sqrt{16}}$

Step 11.8

Simplify the numerator.

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Step 11.8.1

Rewrite $25$ as $5^{2}$ .

$\frac{\sqrt{5^{2}}}{\sqrt{16}}$

Step 11.8.2

Pull terms out from under the radical, assuming positive real numbers.

$\frac{5}{\sqrt{16}}$

Step 11.9

Simplify the denominator.

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Step 11.9.1

Rewrite $16$ as $4^{2}$ .

$\frac{5}{\sqrt{4^{2}}}$

Step 11.9.2

Pull terms out from under the radical, assuming positive real numbers.

$\frac{5}{4}$

Step 12

The result can be shown in multiple forms.

Exact Form:

$\frac{5}{4}$

Decimal Form:

$1.25$