ok so set one side equal to zero by subtractin g7 now we have y^2-2y-15=0 if we factor then set each factor to zero we can solve becasue if we have xy=0 then assume x and y=0 so
y^2-2y-15 find what 2 factors of -15 add to -2 -5 and 3 (x-5)(x+3) tada (x-5)(x+3)=0
