Factor and check x^2 - 15x + 56 = 0

Asked by AnneS2 12 years ago 8/4/2013 8:04 AM

Last updated by anonymous 12 years ago 8/5/2013 2:24 PM

Answered by CherieS 12 years ago 8/5/2013 2:24 PM

x^2 - 15x + 56 = 0

(x )(x ) ( -8)( -7)=0

(x-8) (x-7) = 0

Check:

(x-8) (x-7) = 0

(x)(x) (x)(-7) (-8)(x) (-8)(-7)

x^2 -7x -8x +56

x^2 -15x +56=0