Answer:
(3x - 1)
Step-by-step explanation:
ax^2 + bx + c
rewrite middle term as two sums whose product is a x c
12x^2 + 11x - 5
12x^2 - 4x + 15x - 5
-4 * 15 = 12 * -5
Factor out greatest common factor
4x(3x - 1) + 5x(3x - 1)
Factor polynomial
(3x - 1)(4x + 5)
