x^2 - 20x + 99 = 0 Factor and check

Asked by AnneS2 on 02 Nov 07:26

Last updated by anonymous on 03 Nov 13:50

Answered by CherieS on 03 Nov 13:50

x^2 - 20x + 99 = 0

(x )(x ) ( -11)( -9)=0

(x-11) (x-9) = 0

Check:

(x-11) (x-9) = 0

(x)(x) (x)(-9) (-11)(x) (-11)(-9)=0

x^2 -9x -11x +99=0

x^2 -20x +99=0