计算题:-2x^2y^3×3x^3y^2÷(2xy)^2
(2×y+x²-y²)-(x²-y²-3xy) 计算题,
计算题(-3x^2y^2+6x^2y^2-1/3xy)÷(-1/3xy)
计算题:(-3x^2y^3+6x^2y^2-1/3xy)÷(-1/3xy)
计算题:(-2x+3y)^2
一道计算题:(2x^3y^2-3x^2y+4xy^3)/(-2x)/(-y)
计算题(2x+y)(x+2y)-(2x+3y)(3x-2y)
帮个忙,计算题1.(x^2-6xy+9y^2)÷(x-3y) 2.4x^5y^3÷{x^4y^3÷[x^3y^2÷(x^
计算题:(9x-4y)(-3x+2y)(-2y-3x)
(4x^2-y^2)^2除以(-2x+y分之4x^2-4xy+y^2)^3 ,计算题
计算题:(2x+3y)^2-(4x-9y)(4x+9y)+(2x-3y)^2
有这样一道计算题:“计算(2x-3xy-2xy)-(x-2x+y)+(-x+3xy-y)的值,其中“x=1/2,y=-1
初中的计算题 帮个忙3(y-z)^2-(2y+z)(-z+2y)[x(x^2y^2-xy)-y(x^-x^3y)]/3x