
Hassan O. answered 07/05/16
Tutor
3
(1)
Math major grad: Can tutor various math courses and computer science
hey Alex
sqrt(8-x^2)+x=0
sqrt(8-x^2)=-x
square both sides
8-x^2=x^2
2x^2-8=0
x^2-4=0
x^2=4
x=±2
check
sqrt(8-2^2)+2=sqrt(4)+2=0 not working so might be extraneous solution
try -2
sqrt(8-(2)^2)-2=sqrt(4)-2=0 works!!