Question

If y = 3x² + 4,
find the value of y when x = -2

Answer 1

y = 16

Explanation:

y = 3x² + 4

to find the value of y when x = -2, represent x with -2 in the equation

y = 3(-2)² + 4

= 3(4) + 4

= 12 + 4

y = 16