Question

СРОЧНО ПОМОГИТЕ ПОЖАЛУЙСТА

Answer 1

A1)

(a+b)(c-d)=  ac-ad+bc-bd

OTBET: 1

A2)

(x²y-y²+xy)(x²-2)=  x^4y-x²y²+x³y-2x²y+2y²-2xy

OTBET: 3

A3)

(3a-7b)(2a+3b)+5ab=    6a²+9ab-14ab-21b²+5ab=6a²-21b²

OTBET: 2

A4)

A(b-c)-(2b-2c)=  a(b-c)-2(b-c)=(b-c)(a-2)

OTBET: 2

A5)

Ax+bx-ay-by=x(a+b)-y(a+b)=(a+b)(x-y)

OTBET:4

Answer 2

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