Выполните умножение:
а)(x+4)(y-5)=xy-5x+4y-20
б) (x-8)(6-y)=
в) (-10-x)(y+3)=
г) (-2-y)(x-9)=
а)(x+4)(y-5)=xy-5x+4y-20
б) (x-8)(6-y)=
в) (-10-x)(y+3)=
г) (-2-y)(x-9)=
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Answers & Comments
в) =-10у-30-ху-3х
г) =-2х+18-ху+9у