-2x(3x-7y)+(x-y)(x^2+xy+y^2) 计算
问题描述:
-2x(3x-7y)+(x-y)(x^2+xy+y^2) 计算
答
-2x(3x-7y)+(x-y)(x^2+xy+y^2)=X^3+Y^3-6X^2+14XY
-2x(3x-7y)+(x-y)(x^2+xy+y^2) 计算
-2x(3x-7y)+(x-y)(x^2+xy+y^2)=X^3+Y^3-6X^2+14XY