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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 = ax^2 + bx + c form.

 Feb 6, 2019
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you are given the two roots of the equation    x  =  -3   and   x = 5, so the equation becomes

(x+3)(x-5) = 0        (note the sign change)       Expanded

x^2 -2x-15=0   or 

f(x) = x^2-2x-15   or

y = x^2 -2x-15

 Feb 6, 2019

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