Предмет: Алгебра, автор: sleta1998A

Помогите пожалуйста!!!!
Представьте трехчлен в виде квадрата двучлена!
а)X^2+49-14X=
б)25Y^2+20XY+4X^2=

Ответы

Автор ответа: Аноним

5

х²-14х+49=(х-7)²
25у²+20ху+4х²=(5у+2х)²

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