Evaluate (4-7)^2-6*7+20

${(4 - 7)}^{2} - 6 \cdot 7 + 20$

Step 1

Simplify each term.

Subtract $7$ from $4$ .

${(- 3)}^{2} - 6 \cdot 7 + 20$

Raise $- 3$ to the power of $2$ .

$9 - 6 \cdot 7 + 20$

Multiply $- 6$ by $7$ .

$9 - 42 + 20$

$9 - 42 + 20$

Step 2

Simplify by adding and subtracting.

Subtract $42$ from $9$ .

$- 33 + 20$

Add $- 33$ and $20$ .

$- 13$

$- 13$

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