Question

Select the correct answer.

Which interpretation of this expression is correct?

x2 + 8x + 15

You have to factor this. What factors of 15 (multiplied) but add to give you 8? Five and three. (X+5) (x+3)

(x + 3), (x + 5) are the factors of the equation.

Step-by-step explanation:

x² + 8 x + 15 = 0

x² + 3 x + 5 x + 15 = 0

x (x + 3) + 5 (x + 3) = 0

(x + 3) (x + 5) = 0

Hence (x + 3), (x + 5) are the factors of the equation.