If 2x^{2}-dx+(31-d^{2})x+5 has a factor of x - d, what is the value of d if d is an integer?
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Let: If has a factor of then . Hint: use the rational roots theorem on the resulting cubic in .
post problems in the precalculus forum please.
so if f(d)=0 then then the new f(x) is 2x^2+31x+5??
No, that doesn't mean to let d = 0, that means when x = d, f(x) = 0.
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