answer: since you cant divide by zerothat means this fraction is not legal and its values are undefined
starting with the numerators, x^2 = 9
the square root of 9 is 3 so x= 3.
now for the denominators, 2x-6 = 6x-18
if you plug 3 in you get 2(3)-6=6(3)-18
or 6-6=18-18 which is zero
