GMAT OG DS #56
What is the value of XY?
(1) y= x+1
(2) y = x^2 +1
Answer is E since together x^2 = x can be 1 or 0
but why? My original impulsion is to divide both sides of x^2 = x by x to be simplified to x=1
Thanks
What is the value of XY?
(1) y= x+1
(2) y = x^2 +1
Answer is E since together x^2 = x can be 1 or 0
but why? My original impulsion is to divide both sides of x^2 = x by x to be simplified to x=1
Thanks
