November 2021 1 16 Report

Упростите выражение:

а) (n+1)(2n-3)+(n-1)(3n+1)

б) (x-y)(2x-3y)-(3x-y)(2x+y)

в) (2a+3)(2a+3)-(2a+1)(2a-1)

г) (3c-d)(d+3c)+(4c-d)(c-4d)

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