Question

Which expression is equivalent to this equation

Answer 1

At first convert it to: (x^2 + 9x +20)/x+5

then analyze it:

multiply=20

addition=9. ==>so we must to choose 4 and 5

(4)(5)=20

4+5=9

so we have : (x+4)(x+5)/(x+5) =x+4