Answer:okay so we need to solve for x.--FIRST STEP: 12x^2+5x-4=12^2x+6 would turn into x2 + 5x - 4 = 2x + 6 so it'd have equal bases.SECOND STEP: move any number with "x" in it to the left side. it ends up as x2 + 3x - 4 = 6THEN, we use the AC method to eliminate any unnecessary numbers.you should end up with ( x - 2) (x + 5) = 0SO, the answer is your third option. ( x = 2, x = -5)Step-by-step explanation: