Question

The zeros of a parabola are 6 and −5. If (-1, 3) is a point on the graph, which equation can be solved to find the value of a in the equation of the parabola?

A.3 = a(−1 + 6)(−1 − 5)
B.3 = a(−1 − 6)(−1 + 5)
C.−1 = a(3 + 6)(3 − 5)
D.−1 = a(3 − 6)(3 + 5)

Answer 1

3 = a(−1 − 6)(−1 + 5)

letter (B) is 100% correct on ed. quiz

Answer 2

for roots, r1 and r2 the factors are
(x-r1)(x-r2)
roots are 6 and -5
(x-6)(x+5)
and a point is (-1,3)
(x,y)
y=a(x-6)(x+5)
3=a(-1-6)(-1+5)

B is the answer