Find each of the following products:
(4x+9)×(x−6)
(4x+9)×(x−6)=4x(x−6)+9(x−6)=4x2−24x+9x−54=4x2−15x−54
(2x+5)×(4x−3)
(9x+5y)×(4x+3y)
(9x2−x+15)×(x2−3)
(9x2−x+15)×(x2−x−1)