richd82 richd82 07-04-2020 Mathematics contestada 1. x2+3x+2x2−2x−3⋅x−3x+1 2.x2−8x−9x2−2x−63⋅x2+13x+42x2−2x−3 3.5(x+5)x2+2x−15⋅6(x−3)x2+5x+4