Finite Math Examples

${(8 a^{2} b - 7 c^{3})}^{2}$

Step 1

Rewrite ${(8 a^{2} b - 7 c^{3})}^{2}$ as $(8 a^{2} b - 7 c^{3}) (8 a^{2} b - 7 c^{3})$ .

$(8 a^{2} b - 7 c^{3}) (8 a^{2} b - 7 c^{3})$

Step 2

Expand $(8 a^{2} b - 7 c^{3}) (8 a^{2} b - 7 c^{3})$ using the FOIL Method.

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Step 2.1

Apply the distributive property.

$8 a^{2} b (8 a^{2} b - 7 c^{3}) - 7 c^{3} (8 a^{2} b - 7 c^{3})$

Step 2.2

Apply the distributive property.

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

Step 2.3

Apply the distributive property.

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

Step 3

Simplify and combine like terms.

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Step 3.1

Simplify each term.

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Step 3.1.1

Multiply $a^{2}$ by $a^{2}$ by adding the exponents.

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Step 3.1.1.1

Move $a^{2}$ .

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

Step 3.1.1.2

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

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

Step 3.1.1.3

Add $2$ and $2$ .

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

Step 3.1.2

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

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Step 3.1.2.1

Move $b$ .

$8 a^{4} (b \cdot b) \cdot 8 + 8 a^{2} b (- 7 c^{3}) - 7 c^{3} (8 a^{2} b) - 7 c^{3} (- 7 c^{3})$

Step 3.1.2.2

Multiply $b$ by $b$ .

$8 a^{4} b^{2} \cdot 8 + 8 a^{2} b (- 7 c^{3}) - 7 c^{3} (8 a^{2} b) - 7 c^{3} (- 7 c^{3})$

Step 3.1.3

Multiply $8$ by $8$ .

$64 a^{4} b^{2} + 8 a^{2} b (- 7 c^{3}) - 7 c^{3} (8 a^{2} b) - 7 c^{3} (- 7 c^{3})$

Step 3.1.4

Multiply $- 7$ by $8$ .

$64 a^{4} b^{2} - 56 a^{2} b c^{3} - 7 c^{3} (8 a^{2} b) - 7 c^{3} (- 7 c^{3})$

Step 3.1.5

Multiply $8$ by $- 7$ .

$64 a^{4} b^{2} - 56 a^{2} b c^{3} - 56 c^{3} (a^{2} b) - 7 c^{3} (- 7 c^{3})$

Step 3.1.6

Rewrite using the commutative property of multiplication.

$64 a^{4} b^{2} - 56 a^{2} b c^{3} - 56 c^{3} a^{2} b - 7 \cdot - 7 c^{3} c^{3}$

Step 3.1.7

Multiply $c^{3}$ by $c^{3}$ by adding the exponents.

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Step 3.1.7.1

Move $c^{3}$ .

$64 a^{4} b^{2} - 56 a^{2} b c^{3} - 56 c^{3} a^{2} b - 7 \cdot - 7 (c^{3} c^{3})$

Step 3.1.7.2

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

$64 a^{4} b^{2} - 56 a^{2} b c^{3} - 56 c^{3} a^{2} b - 7 \cdot - 7 c^{3 + 3}$

Step 3.1.7.3

Add $3$ and $3$ .

$64 a^{4} b^{2} - 56 a^{2} b c^{3} - 56 c^{3} a^{2} b - 7 \cdot - 7 c^{6}$

Step 3.1.8

Multiply $- 7$ by $- 7$ .

$64 a^{4} b^{2} - 56 a^{2} b c^{3} - 56 c^{3} a^{2} b + 49 c^{6}$

Step 3.2

Subtract $56 c^{3} a^{2} b$ from $- 56 a^{2} b c^{3}$ .

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Step 3.2.1

Move $c^{3}$ .

$64 a^{4} b^{2} - 56 a^{2} b c^{3} - 56 a^{2} b c^{3} + 49 c^{6}$

Step 3.2.2

Subtract $56 a^{2} b c^{3}$ from $- 56 a^{2} b c^{3}$ .

$64 a^{4} b^{2} - 112 a^{2} b c^{3} + 49 c^{6}$