Предмет: Алгебра, автор: Аноним

87²-13²
—————————————————=?
91²-34 • 91+17²

Помогите пожалуйста решить !!!!!!

Ответы

Автор ответа: sova761

0

87²-13²:(91^2-34 •91+17²)=(87-13)(87+13):
(91-17)^2= 74·100:74^2=
100/74.

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