Предмет: Алгебра, автор: Fashion004

Помогите пожалуйста с алгеброй!!! СРОЧНО!!

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Автор ответа: GovherSalmanova

a) a(b-c)+2b-2c= a(b-c)+2(b-c)= (a+2)(b-c)
б) 2x²+xy-y²=2x²+2xy-xy-y²= (2x²+2xy)-(xy+y²)= 2x(x+y)-y(x+y)=
(2x-y)(x+y)

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