November 2021 2 9 Report

Упростите выражение:

а) (x+4)2-7x ;

б) (c-1)2-(1-2c);

в) (x-y)2+(y-x);

г) (a+b)2-2b(a-b) ;

д) 9m2-(n-3m)2;

е) (a2+b2)-(a-b)2;

ж) z(5-z)+(z-5)2;

з) 3u(u+2)-(u+3)2.

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