(3x^-4xy-6y^)-2(x^-4xy+2y^)
问题描述:
(3x^-4xy-6y^)-2(x^-4xy+2y^)
答
3x^2-4xy-6y^2-2x^2+8xy-4y^2=x^2-4xy-10y^2
(3x^-4xy-6y^)-2(x^-4xy+2y^)
3x^2-4xy-6y^2-2x^2+8xy-4y^2=x^2-4xy-10y^2