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a(2ab+b)-b(a-2ab+a²)=2a²b+ab-ab+2ab²-a²b= a²b + 2ab²
= -6x
B)2a''b+ab-ab+2ab''-a''b=
=a''b+2ab''
(gdzie '' oznacza do potęgi 2)
2x(x-5)-3(x do potęgi 2 - 2x)+(x-2)x =
2x²-10x-3x²+6x+x²-2x =
-6x
B)
a(2ab+b)-b(a-2ab+a do potęgi 2) =
2a²b+ab-ab+2ab²-a²b =
a²b+2ab²