(21x⁴y³-( )+7x²y²)÷﹙-7x²y)= ( )+5xy-y
问题描述:
(21x⁴y³-( )+7x²y²)÷﹙-7x²y)= ( )+5xy-y
亲给我完整步骤哦,先谢啦..
答
(21x⁴y³-( 35x^3y^2)+7x²y²)÷﹙-7x²y)= (-3x^2y^2)+5xy-y
21x^4y^3/(-7x^2y)=-3x^2y^2
-7x^2y*5xy=-35x^3y^2