Question

Sonia graphs the equations y = –x2 + 4x and y = x – 4 to solve the equation –x2 + 4x = x – 4. Her graph is shown below.

What are the solutions of –x2 + 4x = x – 4?

A. –5 and 0
B. –5 and –1
C. –1 and 4
D. 0 and 4

Answer 1

c.-1 and 4 because thats where it intercepts

Answer 2

The line and parabola intersect at x=-1 and x=4, so your solution is C. –1 and 4