Thread: Can someone help me with this pre-Calculus question?

If 2x²-dx+(31-d²)x+5 has a factor of x - d, what is the value of d if d is an integer?

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.