Simplify the rational expression.
x^2 + 2x - 35/x^2 + 4x - 21
To simplify the expression x^2 + 2x - 35 / x^2 + 4x - 21, we first factorize the numerator and denominator to get:
(x + 7)(x - 5) / (x + 7)(x - 3)
Now, we can cancel out the common factor of (x + 7) from both numerator and denominator to simplify the expression further:
(x - 5) / (x - 3)
So, the simplified rational expression is (x - 5) / (x - 3).