Neil G. answered 11/10/17
Tutor
5.0
(59)
Experienced Ivy League ONLINE Tutor in ELA/Math/Test prep skills
Start with x(x+2) -6 + 3(2x+2) =
x2 +2x -6 = 6x+6 =
x2 -4x-12=0 which when factored is
(x-6) (x+2) = 0
so x=6, and x+2 = 8 (6 and 8) or (-2, 0) but the first answer is the right one because 0 isn't an integer, but it is an even number.