square both sides x+10=x^2-4x+4 subtract x from both sides 10=x^2-5x+4 subtract 10 from both sides 0=x^2-3x-6 factor what 2 numbers multiply to get -6 and add to get -5 the numbers are -6 and 1 so (x-6)(x+1)=0 if xy=0 then assume x and y=0 so x-6=0 x=6 x+1=0 x=-1
