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OpenStudy (anonymous):
Find the zeros of the function. f(x) = 9x3 + 18 x2 - 135x -5 and 3 5 and -3 0, 5, and -3 0, -5, and 3
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hartnn (hartnn):
try to factor 9x from 9x3 + 18 x2 - 135x first what u get ?
OpenStudy (gorv):
take 9x common 9x(x^2+2x-15)=9x(x^2+5x-3x-15) 9x(x+5)*(x-3)
OpenStudy (gorv):
zeros 0 -5 3
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