Question 38853
Okay from
x^2 / x+10  + 3x-70 / x+10
we can add the numerator as they are since the denominators are the same, or what are called "like" denominators, so we simply get
(x^2 + 3x - 70) / (x + 10)
Now we factor the numerator and get
(x + 10)(x - 7) / (x + 10)
oh, what a surprise, the x + 10's cancel, leaving
the answer:  x - 7