Ответ:
=2x*(x-3)-x^2*2(5-x)+2x^2-6x=2x*(x-3-5+x^2+x-3)=2x*(-3x-6+x^2)
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Ответ:
=2x*(x-3)-x^2*2(5-x)+2x^2-6x=2x*(x-3-5+x^2+x-3)=2x*(-3x-6+x^2)