Factor completely. If the polynomial cannot be factored, write ʺprime.ʺ
-$$x ^ { 2 } + 8 x + 15$$
A) $( x + 15 ) ( x + 8 )$
B) $( x - 5 ) ( x - 3 )$
C) $( x + 15 ) ( x - 1 )$
D) $( x + 5 ) ( x + 3 )$

Question

Quizplus · Accepted Answer

The correct factorization is found by looking for two numbers that multiply to 15 and add to 8, which are 5 and 3. Therefore, $x^2 + 8x + 15$ factors to $(x + 5)(x + 3)$.

Factor Completely x2+8x+15x ^ { 2 } + 8 x + 15x2+8x+15

Factor Completely $x ^ { 2 } + 8 x + 15$