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Настёнкасолнышко
@Настёнкасолнышко
July 2021
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Выполните умножение
а)(1+х)*(1-х)
б) (х-у)*(х+у)
в) (2а+b)*(a+2b)
г) (5m+7n)*(2n+4m)
д) (2x-3y)*(2x+3y)
e) (-a-b)*(2a-3b)
ж) (2x^2-y^2)*(y^2+2x^3)
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Answers & Comments
alimaimanbayev
A) 1-x+x-x=1-x
B) x^2+xy-xy-y^2=x^2-y^2
C)2a^2+4ab+ab+2b^2=2a^2+5ab+2b^2
D)10mn+20m^2+14n^2+28mn=38mn+20m^2+14n^2
E)4x^2+6xy-6xy-9y^2=4x^2-9y^2
F) -2a^2+3ab-2ab+3b^2=-2a^2+ab+3b^2
G)2x^2y^2+4x^6-y^4-2x^3y^2
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Answers & Comments
B) x^2+xy-xy-y^2=x^2-y^2
C)2a^2+4ab+ab+2b^2=2a^2+5ab+2b^2
D)10mn+20m^2+14n^2+28mn=38mn+20m^2+14n^2
E)4x^2+6xy-6xy-9y^2=4x^2-9y^2
F) -2a^2+3ab-2ab+3b^2=-2a^2+ab+3b^2
G)2x^2y^2+4x^6-y^4-2x^3y^2