Ответ:
1)2x^2-x+3x-5-x^2+5=x^2+2x
2)-2xyx^2-2xy×(-3xy)-2xy×y^2=-2x^3y+6x^2y^2-2xy^3
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Ответ:
1)2x^2-x+3x-5-x^2+5=x^2+2x
2)-2xyx^2-2xy×(-3xy)-2xy×y^2=-2x^3y+6x^2y^2-2xy^3