Quadratic polynomial, so we should have something like this:
(?x + ?)(?x + ?)
f(-3) = 0 means (x+3) is a factor.
f(2) = 0 means (x-2) is a factor
(x+3)(x-2) = x^2 + x - 6
But we want the leading coefficient (on the x^2) to be 7, so
Instead of (x+3)(x-2) = 0, we want 7(x+3)(x-2) = 0
Factored form: 7(x+3)(x-2)
7(x^2 + x - 6)
Expanded form: 7x^2 + 7x - 42