x^2 + 4x - 77 = 0 Factor and check

Asked by AnneS2 11 years ago 11/3/2013 7:14 AM

Last updated by anonymous 11 years ago 11/4/2013 12:19 PM

Answered by CherieS 11 years ago 11/4/2013 12:19 PM

x^2 + 4x - 77 = 0

(x )(x ) ( -7)( +11)=0

(x-7) (x+11) = 0

Check:

(x-7) (x+11) = 0

(x)(x) (x)(11) (-7)(x) (-7)(11)=0

x^2 +11x -7x -77=0

x^2 +4x -77=0