algebra
posted by Shelley on .
Can someone help me explain how factoring is used to solve quadratic equations? I can't find an explaination anywhere.

say for example
x^23x+2 = 0
factor that left side
(x2)(x1) = 0
That tells you that if x = 2, the function is zero, because (22)=0
It also tells you that if x = 1, the function is zero. (11) = 0
so the solution is x = 2 or x = 1