计算:(x+2y)(3x-5y)-(6x的四次方y²-2x²y²)÷(2x²y²)
问题描述:
计算:(x+2y)(3x-5y)-(6x的四次方y²-2x²y²)÷(2x²y²)
答
(x+2y)(3x-5y)-(6x⁴y²-2x²y²)÷(2x²y²)=(x+2y)(3x-5y)-2x²y²(3x²-1)÷(2x²y²)=(3x²-5xy+6xy-10y²)-(3x²-1)=3x²-5xy+6xy-10y...