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What are the solutions to the equation x^3 + 3x^2 = 70x + 144?

label Algebra
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For the function f(x) = x3 + 3x2 – 70x – 144, f(–9) = 0, f(–2) = 0, and f(8) = 0

A: x = –8, x = 2, and x = 9

B; x = –9, x = –2, and x = 8

C: x = –8, x = –2, and x = 9

D: x = –9, x = –8, and x = –2

May 22nd, 2015

Solution to this polynomial function are the values of x at which f(x)=0;

and it is given that f(–9) = 0, f(–2) = 0, and f(8) = 0 

So solution to this given polynomial is x = –9, x = –2, and x = 8

Correct choice is B

May 22nd, 2015

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