Question

Simplify:
7x³ + 5x² -2 = [?]
X=-1

Answer 1

Answer: - 4

Explanation:

Since x is already given, which is -1, just substitute the value.

7 * -1 * -1 * -1 + 5 * -1 * -1 - 2

7 * -1 + 5 * 1 - 2

-7 + 5 - 2

-2 - 2 = - 4