Question

Which functions have real zeros at 1 and 4? Check all that apply.

f(x) = x2 + x + 4
f(x) = x2 – 5x + 4
f(x) = x2 + 3x – 4
f(x) = –2x2 + 10x – 8
f(x) = –4x2 – 16x – 1

Answer 1

B and D

f(x) = x^2 -5x +4

f(x) = -2x^2 +10x-8

Explanation:

Answer 2

f(x) = x^2 -5x +4
f(x) = -2x^2 +10x-8