Question

7x+42/x^+13x+42 simplify

Answer 1

Assuming you meant to write $\dfrac{7x+42}{x^2+13x+42}$, then you can simplify this by first factoring the numerator and denominator.

$\dfrac{7(x+6)}{(x+6)(x+7)}$

Notice that (x+6) is common to the numerator and denominator. You can cancel this factor so long as you remember to exclude 6 from the domain.

Simplifying further, you have $\dfrac{7}{x+7}$, where x ≠ 6, x ≠ 7.