Find each of the following products:
(9x2−x+15)×(x2−x−1)
(9x2−x+15)×(x2−x−1)9x3−x+15×x2−x−1 –––––––––––––––––9x4−x3+15x2 −9x3+x2−15x −9x2+x−15 –––––––––––––––––––––––––––––––9x4−10x3+7x2−14x−15 ––––––––––––––––––––––––––––––––––=9x4−10x3+7x2−14x−15
(9x2−x+15)×(x2−3)