Question

What are the x-intercepts for the function ƒ(x) = -x(x − 4)?

A 0
B -1, 4
C 4
D 0, 4

What are the solutions to the quadratic equation 4x2 − x − 3 = 0?

Answer 1

D

Explanation:

f(x)=-x(x-4)

f(x)=-x²+4x

-x²+4x=0

x(-x+4)=0

x=0, x=4

(2)

4x²-x-3=0

(4x²+3x)-(4x-3)=0

x(4x+3)-1(4x+3)=0

x=1, x=-3/4