Question

Find f(-4) for f(x) = -3x2 + 8x – 4.

Answer 1

f(x) = -3x² + 8x - 4

Evaluate the function for x = -4 :

f(-4) = -3(-4)² + 8(-4) - 4 = -3*16 - 32 - 4 = -48 - 36 = -84