Hi,

Quick question.

Say we have a polynomial $\displaystyle k^2 + k - 12 $, one can use FOIL to find the factors.

However, is there a shortcut for doing the opposite.

i.e. I have $\displaystyle (k-3)(k+4) $ but want to find the polynomial? What confused me is that $\displaystyle - 3.-4 $ will give -12 but so will $\displaystyle +3.-4$.

Thanks