Question 161445
(X+X+1)^2==X+11
(2X+1)^2=X+11
4X^2+4X+1=X+11
4X^2+4X-X+1-11=0
4X^2+3X-10=0
(4X-5)(X+2)=0
4X-5=0
4X=5
X=5/4=1.25 ANSWER.
X=2=0 
X=-2 ANSWER.