Answer:
(3x +1)(x-4)
Step-by-step explanation:
Factor using the a × c method.
3x² - 11x - 4 = 0
ac = (-12)
Factors that multiply to (-12) but add to (-11): -12 and +1.
New equation: 3x² - 12x + 1x - 4 = 0
Factor as follows:
3x² - 12x = 3x(x-4)
1x - 4 = 1(x-4)
Combine the outside numbers with the inside quantity.
= (3x+1)(x-4)
