Question 170754
just reverse the process..if you have x=1 then what does it take to get x to equal zero.....subtract 1 from each side..x-1=0   do the same for x=-8...only this time you have to add 8...x+8=0


so we have {{{(x-1)(x+8)=0}}} or{{{x^2+8x-x-8=0}}} or {{{x^2+7x-8=0}}}