How do you factor x2-20 plus 100 equals 0?

Answer 1

I'm guessing you meant to say x2 -20x +100. This equation is in ax2+bx+c=0 (1 is the "a" term, -20 is the "b" term, and 100 is the "c" term. You have to think to yourself, what factors of the "c" term (100) will add to the "b" term (-20) These factors are -10 and -10 because when you add these two terms you get -20 and when you multiply these two terms you get 100. Now your equations should read like this: (x-10)(x-10) = 0 . then you have to get x by itself by adding 10 to both sides. Thus, 10 is your factor.