Question

What is #3 step by step?

Answer 1

When there is a minus before a parenthesis, you must change the sign of the number(s) inside the parenthesis.

(-9) - (-7) × [2 - (-9)]^2 + (-7)

-9 + 7 × [2 + 9]^2 - 7

- 9 + 7 * (11)^2 - 7

-9 + 7*121 - 7

-9 + 847 - 7

831