Posted by Melissa on Friday, September 28, 2012 at 3:39pm.
we know that
5x^3+x^2+3 = p(x)*(5x^2-14x+42) - 123
so,
5x^3 + x^2 + 126 = p(x)*(5x^2 - 14x + 42)
a simple long division yields p(x) = (x+3)
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