(8x^8-9)(x^9-5)
8x^8*x*9 + 8x^8*(-5) -9*x^9 -9*(-5) = 8x^17 - 40x^8 - 9x^9 + 45, 8x^17 - 9x^9 - 40x^8 + 45.
You can ask a new question or answer this question.