Answer:
y = x² + x - 12
Step-by-step explanation:
Given the solutions are x = - 4 and x = 3, then the factors are
x(x - (- 4)) and (x - 3), that is (x + 4) and (x - 3)
The equation is then the product of the factors
y = (x + 4)(x - 3) ← expand using FOIL
= x² - 3x + 4x - 12
= x² + x - 12 ← in standard form
