The x-intercepts of the parabola y = x^2 + bx + c are (-3,0) and (-5,0) Find the equation of the parabola, and submit your answer in y = x^2 + bx + c form.
roots at x = -3 and x = -5 : (x+3)(x+5) = 0
x^2 + 8x + 15 = 0
...or f(x) = y = x^2 +8x + 15
