Basic Math Examples

$\frac{b}{9 b^{2} - 4} + \frac{b + 1}{6 b^{2} - 4 b} - \frac{1}{6 b + 4}$

Step 1

Simplify each term.

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Step 1.1

Simplify the denominator.

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Step 1.1.1

Rewrite $9 b^{2}$ as ${(3 b)}^{2}$ .

$\frac{b}{{(3 b)}^{2} - 4} + \frac{b + 1}{6 b^{2} - 4 b} - \frac{1}{6 b + 4}$

Step 1.1.2

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

$\frac{b}{{(3 b)}^{2} - 2^{2}} + \frac{b + 1}{6 b^{2} - 4 b} - \frac{1}{6 b + 4}$

Step 1.1.3

Since both terms are perfect squares, factor using the difference of squares formula, $a^{2} - b^{2} = (a + b) (a - b)$ where $a = 3 b$ and $b = 2$ .

$\frac{b}{(3 b + 2) (3 b - 2)} + \frac{b + 1}{6 b^{2} - 4 b} - \frac{1}{6 b + 4}$

Step 1.2

Factor $2 b$ out of $6 b^{2} - 4 b$ .

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Step 1.2.1

Factor $2 b$ out of $6 b^{2}$ .

$\frac{b}{(3 b + 2) (3 b - 2)} + \frac{b + 1}{2 b (3 b) - 4 b} - \frac{1}{6 b + 4}$

Step 1.2.2

Factor $2 b$ out of $- 4 b$ .

$\frac{b}{(3 b + 2) (3 b - 2)} + \frac{b + 1}{2 b (3 b) + 2 b (- 2)} - \frac{1}{6 b + 4}$

Step 1.2.3

Factor $2 b$ out of $2 b (3 b) + 2 b (- 2)$ .

$\frac{b}{(3 b + 2) (3 b - 2)} + \frac{b + 1}{2 b (3 b - 2)} - \frac{1}{6 b + 4}$

Step 1.3

Factor $2$ out of $6 b + 4$ .

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Step 1.3.1

Factor $2$ out of $6 b$ .

$\frac{b}{(3 b + 2) (3 b - 2)} + \frac{b + 1}{2 b (3 b - 2)} - \frac{1}{2 (3 b) + 4}$

Step 1.3.2

Factor $2$ out of $4$ .

$\frac{b}{(3 b + 2) (3 b - 2)} + \frac{b + 1}{2 b (3 b - 2)} - \frac{1}{2 (3 b) + 2 (2)}$

Step 1.3.3

Factor $2$ out of $2 (3 b) + 2 (2)$ .

$\frac{b}{(3 b + 2) (3 b - 2)} + \frac{b + 1}{2 b (3 b - 2)} - \frac{1}{2 (3 b + 2)}$

Step 2

Find the common denominator.

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Step 2.1

Multiply $\frac{b}{(3 b + 2) (3 b - 2)}$ by $\frac{2 b}{2 b}$ .

$\frac{b}{(3 b + 2) (3 b - 2)} \cdot \frac{2 b}{2 b} + \frac{b + 1}{2 b (3 b - 2)} - \frac{1}{2 (3 b + 2)}$

Step 2.2

Multiply $\frac{b}{(3 b + 2) (3 b - 2)}$ by $\frac{2 b}{2 b}$ .

$\frac{b (2 b)}{(3 b + 2) (3 b - 2) (2 b)} + \frac{b + 1}{2 b (3 b - 2)} - \frac{1}{2 (3 b + 2)}$

Step 2.3

Multiply $\frac{b + 1}{2 b (3 b - 2)}$ by $\frac{3 b + 2}{3 b + 2}$ .

$\frac{b (2 b)}{(3 b + 2) (3 b - 2) (2 b)} + \frac{b + 1}{2 b (3 b - 2)} \cdot \frac{3 b + 2}{3 b + 2} - \frac{1}{2 (3 b + 2)}$

Step 2.4

Multiply $\frac{b + 1}{2 b (3 b - 2)}$ by $\frac{3 b + 2}{3 b + 2}$ .

$\frac{b (2 b)}{(3 b + 2) (3 b - 2) (2 b)} + \frac{(b + 1) (3 b + 2)}{2 b (3 b - 2) (3 b + 2)} - \frac{1}{2 (3 b + 2)}$

Step 2.5

Multiply $\frac{1}{2 (3 b + 2)}$ by $\frac{(3 b - 2) b}{(3 b - 2) b}$ .

$\frac{b (2 b)}{(3 b + 2) (3 b - 2) (2 b)} + \frac{(b + 1) (3 b + 2)}{2 b (3 b - 2) (3 b + 2)} - (\frac{1}{2 (3 b + 2)} \cdot \frac{(3 b - 2) b}{(3 b - 2) b})$

Step 2.6

Multiply $\frac{1}{2 (3 b + 2)}$ by $\frac{(3 b - 2) b}{(3 b - 2) b}$ .

$\frac{b (2 b)}{(3 b + 2) (3 b - 2) (2 b)} + \frac{(b + 1) (3 b + 2)}{2 b (3 b - 2) (3 b + 2)} - \frac{(3 b - 2) b}{2 (3 b + 2) ((3 b - 2) b)}$

Step 2.7

Reorder the factors of $(3 b + 2) (3 b - 2) (2 b)$ .

$\frac{b (2 b)}{2 b (3 b + 2) (3 b - 2)} + \frac{(b + 1) (3 b + 2)}{2 b (3 b - 2) (3 b + 2)} - \frac{(3 b - 2) b}{2 (3 b + 2) ((3 b - 2) b)}$

Step 2.8

Reorder the factors of $2 b (3 b - 2) (3 b + 2)$ .

$\frac{b (2 b)}{2 b (3 b + 2) (3 b - 2)} + \frac{(b + 1) (3 b + 2)}{2 b (3 b + 2) (3 b - 2)} - \frac{(3 b - 2) b}{2 (3 b + 2) ((3 b - 2) b)}$

Step 2.9

Reorder the factors of $2 (3 b + 2) ((3 b - 2) b)$ .

$\frac{b (2 b)}{2 b (3 b + 2) (3 b - 2)} + \frac{(b + 1) (3 b + 2)}{2 b (3 b + 2) (3 b - 2)} - \frac{(3 b - 2) b}{2 b (3 b + 2) (3 b - 2)}$

Step 3

Combine the numerators over the common denominator.

$\frac{b (2 b)}{2 b (3 b + 2) (3 b - 2)} + \frac{(b + 1) (3 b + 2) - (3 b - 2) b}{2 b (3 b + 2) (3 b - 2)}$

Step 4

Simplify each term.

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Step 4.1

Expand $(b + 1) (3 b + 2)$ using the FOIL Method.

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Step 4.1.1

Apply the distributive property.

$\frac{b (2 b)}{2 b (3 b + 2) (3 b - 2)} + \frac{b (3 b + 2) + 1 (3 b + 2) - (3 b - 2) b}{2 b (3 b + 2) (3 b - 2)}$

Step 4.1.2

Apply the distributive property.

$\frac{b (2 b)}{2 b (3 b + 2) (3 b - 2)} + \frac{b (3 b) + b \cdot 2 + 1 (3 b + 2) - (3 b - 2) b}{2 b (3 b + 2) (3 b - 2)}$

Step 4.1.3

Apply the distributive property.

$\frac{b (2 b)}{2 b (3 b + 2) (3 b - 2)} + \frac{b (3 b) + b \cdot 2 + 1 (3 b) + 1 \cdot 2 - (3 b - 2) b}{2 b (3 b + 2) (3 b - 2)}$

Step 4.2

Simplify and combine like terms.

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Step 4.2.1

Simplify each term.

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Step 4.2.1.1

Rewrite using the commutative property of multiplication.

$\frac{b (2 b)}{2 b (3 b + 2) (3 b - 2)} + \frac{3 b \cdot b + b \cdot 2 + 1 (3 b) + 1 \cdot 2 - (3 b - 2) b}{2 b (3 b + 2) (3 b - 2)}$

Step 4.2.1.2

Multiply $b$ by $b$ by adding the exponents.

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Step 4.2.1.2.1

Move $b$ .

$\frac{b (2 b)}{2 b (3 b + 2) (3 b - 2)} + \frac{3 (b \cdot b) + b \cdot 2 + 1 (3 b) + 1 \cdot 2 - (3 b - 2) b}{2 b (3 b + 2) (3 b - 2)}$

Step 4.2.1.2.2

Multiply $b$ by $b$ .

$\frac{b (2 b)}{2 b (3 b + 2) (3 b - 2)} + \frac{3 b^{2} + b \cdot 2 + 1 (3 b) + 1 \cdot 2 - (3 b - 2) b}{2 b (3 b + 2) (3 b - 2)}$

Step 4.2.1.3

Move $2$ to the left of $b$ .

$\frac{b (2 b)}{2 b (3 b + 2) (3 b - 2)} + \frac{3 b^{2} + 2 \cdot b + 1 (3 b) + 1 \cdot 2 - (3 b - 2) b}{2 b (3 b + 2) (3 b - 2)}$

Step 4.2.1.4

Multiply $3 b$ by $1$ .

$\frac{b (2 b)}{2 b (3 b + 2) (3 b - 2)} + \frac{3 b^{2} + 2 b + 3 b + 1 \cdot 2 - (3 b - 2) b}{2 b (3 b + 2) (3 b - 2)}$

Step 4.2.1.5

Multiply $2$ by $1$ .

$\frac{b (2 b)}{2 b (3 b + 2) (3 b - 2)} + \frac{3 b^{2} + 2 b + 3 b + 2 - (3 b - 2) b}{2 b (3 b + 2) (3 b - 2)}$

Step 4.2.2

Add $2 b$ and $3 b$ .

$\frac{b (2 b)}{2 b (3 b + 2) (3 b - 2)} + \frac{3 b^{2} + 5 b + 2 - (3 b - 2) b}{2 b (3 b + 2) (3 b - 2)}$

Step 4.3

Apply the distributive property.

$\frac{b (2 b)}{2 b (3 b + 2) (3 b - 2)} + \frac{3 b^{2} + 5 b + 2 + (- (3 b) - - 2) b}{2 b (3 b + 2) (3 b - 2)}$

Step 4.4

Multiply $3$ by $- 1$ .

$\frac{b (2 b)}{2 b (3 b + 2) (3 b - 2)} + \frac{3 b^{2} + 5 b + 2 + (- 3 b - - 2) b}{2 b (3 b + 2) (3 b - 2)}$

Step 4.5

Multiply $- 1$ by $- 2$ .

$\frac{b (2 b)}{2 b (3 b + 2) (3 b - 2)} + \frac{3 b^{2} + 5 b + 2 + (- 3 b + 2) b}{2 b (3 b + 2) (3 b - 2)}$

Step 4.6

Apply the distributive property.

$\frac{b (2 b)}{2 b (3 b + 2) (3 b - 2)} + \frac{3 b^{2} + 5 b + 2 - 3 b \cdot b + 2 b}{2 b (3 b + 2) (3 b - 2)}$

Step 4.7

Multiply $b$ by $b$ by adding the exponents.

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Step 4.7.1

Move $b$ .

$\frac{b (2 b)}{2 b (3 b + 2) (3 b - 2)} + \frac{3 b^{2} + 5 b + 2 - 3 (b \cdot b) + 2 b}{2 b (3 b + 2) (3 b - 2)}$

Step 4.7.2

Multiply $b$ by $b$ .

$\frac{b (2 b)}{2 b (3 b + 2) (3 b - 2)} + \frac{3 b^{2} + 5 b + 2 - 3 b^{2} + 2 b}{2 b (3 b + 2) (3 b - 2)}$

Step 5

Simplify terms.

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Step 5.1

Combine the opposite terms in $3 b^{2} + 5 b + 2 - 3 b^{2} + 2 b$ .

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Step 5.1.1

Subtract $3 b^{2}$ from $3 b^{2}$ .

$\frac{b (2 b)}{2 b (3 b + 2) (3 b - 2)} + \frac{5 b + 2 + 0 + 2 b}{2 b (3 b + 2) (3 b - 2)}$

Step 5.1.2

Add $5 b + 2$ and $0$ .

$\frac{b (2 b)}{2 b (3 b + 2) (3 b - 2)} + \frac{5 b + 2 + 2 b}{2 b (3 b + 2) (3 b - 2)}$

Step 5.2

Add $5 b$ and $2 b$ .

$\frac{b (2 b)}{2 b (3 b + 2) (3 b - 2)} + \frac{7 b + 2}{2 b (3 b + 2) (3 b - 2)}$

Step 5.3

Combine the numerators over the common denominator.

$\frac{b (2 b) + 7 b + 2}{2 b (3 b + 2) (3 b - 2)}$

Step 6

Simplify each term.

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Step 6.1

Rewrite using the commutative property of multiplication.

$\frac{2 b \cdot b + 7 b + 2}{2 b (3 b + 2) (3 b - 2)}$

Step 6.2

Multiply $b$ by $b$ by adding the exponents.

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Step 6.2.1

Move $b$ .

$\frac{2 (b \cdot b) + 7 b + 2}{2 b (3 b + 2) (3 b - 2)}$

Step 6.2.2

Multiply $b$ by $b$ .

$\frac{2 b^{2} + 7 b + 2}{2 b (3 b + 2) (3 b - 2)}$