x ^2 + 10x + 0 pretty much you need a number that multiplies to 0, and adds up to a positive 10.
10 and 0, 10x0 = 0 and 10 + 0 = 10 these numbers satisfy both conditions.
(x - 10) (x + 0) is your answer
since we already know x = 10 and x =0
if we solve x - 10 = 0 we get positive 10 that is why it is x-10 and not x+10
(x - 10) (x + 0) is your answer