Answer
The solutions are -11 and 7.
Work Step by Step
(x-7)(x+11)=0
(x+11)=0 (x-7)=0
x+11-11=0-11 or x-7+7=0+7
x=-11 or x=7
The solutions are -11 and 7.
Check
Let x=-11
(x-7)(x+11)=0
(-11-7)(-11+11)=0
-18*0=0
0=0
Let x=7
(x-7)(x+11)=0
(7-7)(7+11)=0
0*18=0
0=0