Algebra Examples

$(2 a^{2} b - 5 b^{3} + 4 a^{4} b^{2}) - (7 b^{3} + 8 a^{4} b^{2} - 7 a^{2} b)$

Step 1

To write a polynomial in standard form, simplify and then arrange the terms in descending order.

$a x^{2} + b x + c$

Step 2

Simplify each term.

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Step 2.1

Apply the distributive property.

$2 a^{2} b - 5 b^{3} + 4 a^{4} b^{2} - (7 b^{3}) - (8 a^{4} b^{2}) - (- 7 a^{2} b)$

Step 2.2

Simplify.

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Step 2.2.1

Multiply $7$ by $- 1$ .

$2 a^{2} b - 5 b^{3} + 4 a^{4} b^{2} - 7 b^{3} - (8 a^{4} b^{2}) - (- 7 a^{2} b)$

Step 2.2.2

Multiply $8$ by $- 1$ .

$2 a^{2} b - 5 b^{3} + 4 a^{4} b^{2} - 7 b^{3} - 8 (a^{4} b^{2}) - (- 7 a^{2} b)$

Step 2.2.3

Multiply $- 7$ by $- 1$ .

$2 a^{2} b - 5 b^{3} + 4 a^{4} b^{2} - 7 b^{3} - 8 (a^{4} b^{2}) + 7 (a^{2} b)$

Step 2.3

Remove parentheses.

$2 a^{2} b - 5 b^{3} + 4 a^{4} b^{2} - 7 b^{3} - 8 a^{4} b^{2} + 7 a^{2} b$

Step 3

Simplify by adding terms.

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Step 3.1

Add $2 a^{2} b$ and $7 a^{2} b$ .

$- 5 b^{3} + 4 a^{4} b^{2} - 7 b^{3} - 8 a^{4} b^{2} + 9 a^{2} b$

Step 3.2

Subtract $7 b^{3}$ from $- 5 b^{3}$ .

$- 12 b^{3} + 4 a^{4} b^{2} - 8 a^{4} b^{2} + 9 a^{2} b$

Step 3.3

Subtract $8 a^{4} b^{2}$ from $4 a^{4} b^{2}$ .

$- 12 b^{3} - 4 a^{4} b^{2} + 9 a^{2} b$

Step 3.4

Reorder $- 12 b^{3}$ and $- 4 a^{4} b^{2}$ .

$- 4 a^{4} b^{2} - 12 b^{3} + 9 a^{2} b$