Question

Find the factors of the expression $3x^2-5x-8$

• A. (x+1) and (3x + 8)
• B. (x+1) and (3x - 8)
• C. (x-1) and (3x + 8)
• D. (x - 1) and (3x - 8)

Answer 1

Answer:

B. (x+1) and (3x - 8)

$3x^2-5x-8$

$=3x^2-8x+3x-8$

$=x(3x-8)+(3x-8)$

$=(3x-8)(x+1)$