Arthur D. answered 03/09/15
Tutor
4.9
(306)
Forty Year Educator: Classroom, Summer School, Substitute, Tutor
x^2-12x+49=2x
x^2-12x+49-2x=0
x^2-14x+49=0
7*7=49 and 7+7=14
(x-7)(x-7)=0
x-7=0
x=7
x-7=0
x=7
you have a double or multiple root, 7