Question

Answer 1

`a)A=2x(x-y)+y(2x-y)`

`A=2x^2-2xy+2xy-y^2`

`A=2x^2-y^2`

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`b)B=-x^2(3x+2)+x(5x-4)+3x^2(x-1)+2x-1`

`B=-3x^3-2x^2+5x^2-4x+3x^3-3x^2+2x-1`

`B=-2x-1`

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`c)C=xy^2(x+1)+y^2(2x^2-x+2)-x^2y^2`

`C=x^2y^2+xy^2+2x^2y^2-xy^2+2y^2-x^2y^2`

`C=2xy^2+2y^2`

Answer 2

a: \(=2x^2-2xy+2xy-y^2=2x^2-y^2\)

b: \(=-3x^3-2x^2+5x^2-4x+3x^3-3x^2+2x-1\)

\(=-2x-1\)