Question

What is the quotient of
x+4÷x2-16 over x2-1÷x2+3x-28

Answer 1

`((x+4)/(x^2-16))/((x^2-1)/(x^2+3x-28))\\=(x+4)/((x+4)(x-4))*((x-4)(x+7))/((x-1)(x+1))\\=(x+7)/(x^2-1)`