50 might be the answer because 12÷6=2 so I just multiplied 15×2 and that equaled my answer, 50
Yes you take 3 times 4 and receive 12 and 5 times 4 and receive 20
(x^2 - 1)(x^6 + x^4 + x^2) =
x^2(x^6 + x^4 + x^2) - 1(x^6 + x^4 + x^2) =
x^8 + x^6 + x^4 - x^6 - x^4 - x^2 =
x^8 - x^2 <==