Предмет: Алгебра, автор: lord20678

Упростите выражение, применив формулы сокращенного умножения (квадрат суммы или квадрат разности, разность квадратов) (7m– 2)2 - (7m– 1)(7m + 1)?



- 14m + 3
- 14m + 5
- 28m + 3
- 28m + 5

Ответы

Автор ответа: RTA1414
3

Ответ: -28m+5.

Объяснение:

(7m-2)²-(7m-1)(7m+1)=49m²-28m+4-(49m²-1)=

=49m²-28m+4-49m²+1= -28m+5.

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