Answer:
y = (x - 4)(x + 9).
Step-by-step explanation:
Intercept form is y = a(x + b)(x + c)
y = x^2 + 5x - 36.
Here the coefficient of x^2 is 1 so a = 1.
To find b and c we need 2 numbers whose product is -36 and whose sum = +5. These are + 9 and - 4 so the answer is:
y = (x - 4)(x + 9).
