Question 339668
2*6=12 FT^2 IS THE AREA OF THE MIRROR.
(2+2X)(6+2X)=12+9
12+12X+4X+4X^2=21
4X^2+16X+12-21=0
4X^2+16X-9=0
(2X-1)(2X+9)=0
2X-1=0
2X=1
X=1/2 ANS.
2X+9=0
2X=-9
X=-9/2
X=-4.5 ANS.