How to solve this equation (2a - 2) (a + 1) =0

Explain why the function is discontinuous at the given number a. (select all that apply.) f(x) = 1 x + 1 a = −1 f(−1) is undefined. lim x→−1+ f(x) and lim x→−1− f(x) exist, but are not equal. lim x→−1 f(x) does not exist. f(−1) and lim x→−1 f(x) exist, but are not equal. none of the above

If f(x)=x^3 and g(x)=2x+7 when g(x)=-5

Find the greatest common factor of the followig monomials 21u^5v,3u^4v^6, and 3u^2v^5