Write the equation for the parabola that has x− intercepts (−2,0) and (1.2,0) and y− intercept (0,−4).

Question

Please tell me what the equation is not how to get it!

Answer 1

y = a [x - (-2)] (x - 1.2) = a(x + 2)(x - 1.2)

-4 = a(0 + 2)(0 - 1.2)

-4 = -2.4a

a = 4/2.4

y = (4/2.4)(x + 2)(x - 1.2)