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Define the formula for a parabola (a quadratic function) that has horizontal intercepts (roots) at x = − 8 x=-8 and x = − 4 x=-4 and passes through the point ( 0 , − 7 ) (0,-7) .

Respuesta :

sqdancefan
The form of it will be
.. y = a(x +8)(x +4)
At x=0, this is
.. -7 = 32a
.. a = -7/32

The formula is
.. f(x) = (-7/32)(x +8)(x +4)
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