Answer:
D
Explanation:
3x² - 10x - 8
consider the factors of the product of the coefficient of the x² term and the constant term which sum to give the coefficient of the x- term.
product = 3 × - 8 = - 24 and sum = - 10
the factors are - 12 and + 2
use these factors to split the x- term
3x² - 12x + 2x - 8 ( factor the first/second and third/fourth terms )
= 3x(x - 4) + 2(x - 4) ← factor out (x - 4) from each term
= (x - 4)(3x + 2)