Answer:
y = 4x² + 36x + 80
Step-by-step explanation:
Since the roots are x = - 5 and x = - 4 then the factors are
(x + 5) and (x + 4)
The equation is the product of the factors
y = (x + 5)(x + 4) and with leading coefficient of 4 is
y = 4(x + 5)(x + 4) ← expand factors
= 4(x² + 9x + 20)
= 4x² + 36x + 80
