Find a formula for a cubic function f if
f(3) = 144
and
f(−5) = f(0) = f(4) = 0.
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1 answer

since you have given the three zeroes, it is clear that
f(x) = a(x+5)(x)(x4)
since f(3) = 144,
a(8)(3)(1) = 144
a =6
so
f(x) = 6x(x+5)(x4) 👍
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answered by oobleck
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