answer: x=+/- square root of y+5 (A, i think this one kinda confused me)
y=x^2-5 substitute y for 0 0=x^2-5 subtract x^2 on both sides -x^2=-5 since they both can be negative and positive change signs to positive to be easier x^2=5 square root both sides x=+/- square root of 5
