12a2+8a-15
What is your question? Do you want it factored?
Try to find factors of the end terms that will add to the center term.
12x^2 + 8a - 15 = (2x+3)(6x-5)
Try to find factors of the end terms that will add to the center term.
12x^2 + 8a - 15 = (2x+3)(6x-5)