直接用公式计算:(3x-2y)(9x^2+6xy+4y^2)=
用公式计算(2y-3x)(4y²+6xy+9x²﹚
(x-2xy)*(-xy+2y*y)-(3x*x-2xy)(x-9xy+6y*y)
(x^2+xy/x-y)/(xy/x-y)计算
x+y 3次方 公式是不是 = (x+y)(x^2-xy+y^2)?
化简:x-y/x+3y÷x^-y^2/x^2+6xy+9y^2-(xy/x+y)
计算3xy[2xy-x(y-2)+x-1]
计算:3xy[2xy-x(y-2)+x]
计算(x^8-x^7y+x^5y^3-x^4y^4+x^3y^5-x^y^7+y^8)(x^2+xy+y^2)
x*-2xy+3y*=9 4x*-5xy+6y*=30
x-y/xy-y^2计算
计算4xy+(x-2y)的平方+(x+3y)(3y-x)
先化简,后求值(x+5y)(x+4y)(x-y)(x+y),其中,x=-2又2/3,y=3/7,用公式计算