Question

4x^2 - x - 7 when x = -2

Answer 1

11

Explanation:

Lets plug in -2 for x

Remember that a negative number times a negative number is positive, so (-2)² is positive 4. Also remember subtracting by a negative means you are adding the number.

`4x^2 - x - 7 \\\\4(-2)^2 - (-2) - 7 \\\\4(4) + 2-7\\\\16 -5\\\\11`

So the answer is 11