Question

Question

Select the correct answer.
Which interpretation of this expression is correct?
x2 + 8x + 15

Answer 1

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

Explanation:

Answer 2

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

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.