The way you wrote the equation, it cannot be solved, at least in the sense that I think you mean. That is because and are two different things. That means you have a single equation in two different variables. You can solve for in terms of , or for in terms of . However, I'm going to go out on a limb and assume that you were just too lazy to proofread and correct your post before you submitted it and that you actually meant:
Factor out an
Then factor the trinomial
Since at least one of the three factors must be zero so that the entire product is zero, either:
or
So you have to roots, 0 and 7, one of which has a multiplicity of two.
John
My calculator said it, I believe it, that settles it
