Question

: If f(x) = 3 + 2x - 10x^2, find f(-4)

Answer 1

Answer:

$f( - 4) = 3 + (2\times - 4) \\ = 3 - 8 \\ = - 5$

Answer 2

f(x) = 3 + 2x - 10x^2
f(-4) = 3 + 2(-4) - 10(-4)^2
f(-4) = 3 - 8 + 40^2
f(-4) = 3 - 8 + 1600
f(-4) = 1,595