Question

What are the zeros of f(x)=x2-8x+16?

OA. x=-4 and x = 4
OB. x= -4 only
OC. x=-2 and x = 8
O D. x = 4 only

Answer 1

The answer is D. x = 4 only

You make a quadratic equation with 0 on one side and solve it.

x²-8x+16=0

D = (-8)²-4*1*16=64-64=0

Now find the x:

x= (8+0)/2=4

The answer is 4.