Algebra Examples

${(x - 7)}^{3}$

Step 1

Use the Binomial Theorem.

$x^{3} + 3 x^{2} \cdot - 7 + 3 x {(- 7)}^{2} + {(- 7)}^{3}$

Step 2

Simplify each term.

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Step 2.1

Multiply $- 7$ by $3$ .

$x^{3} - 21 x^{2} + 3 x {(- 7)}^{2} + {(- 7)}^{3}$

Step 2.2

Raise $- 7$ to the power of $2$ .

$x^{3} - 21 x^{2} + 3 x \cdot 49 + {(- 7)}^{3}$

Step 2.3

Multiply $49$ by $3$ .

$x^{3} - 21 x^{2} + 147 x + {(- 7)}^{3}$

Step 2.4

Raise $- 7$ to the power of $3$ .

$x^{3} - 21 x^{2} + 147 x - 343$