计算1.(-2x^4y^2z^3)*(-3x^2y^2z^4)= 2.(5x^3-2x^2+3x+4)-(3x^3-5x

来源：学生作业帮编辑：作业帮分类：数学作业时间：2024/05/09 05:32:12

计算1.(-2x^4y^2z^3)*(-3x^2y^2z^4)= 2.(5x^3-2x^2+3x+4)-(3x^3-5x^2+3)= 3.(√3+3√2)(2√3-√2)=求答案

1.(-2x^4y^2z^3)*(-3x^2y^2z^4)= 6x^6y^4z^7
2.(5x^3-2x^2+3x+4)-(3x^3-5x^2+3)= 2x^3+3x^2+1
3.(√3+3√2)(2√3-√2)=5√6
如果认为讲解不够清楚,

1.（x+y-z)+(x-y+z)-(x-y-z) 2.2x-(3x-2y+3)-(5y-2) (4x-2y-z)-{5x[8y-2y-(x+y)]-x+(3y-10z)]=? kuai 计算：3x-2y- [-4x+(z+3y)] 已知3x-2y-5z=0,2x-5y+4z=0,且x,y,z均不为0,求3x*x+2y*y+5z*z/5x*x+y*y- x/2=y/3=z/5 x+3y-z/x-3y+z 1.x+y+z=30,3x+y-z=50,x,y,z为非负数,求5x+4y+2z取值范围. {5x-3y+z=2{5x+2y-4z=3{-5x+y-z=2 {x-y-z=-1{3x+5y+7z{4x-y+2x=- 已知3x-2y-5z=0,2x-5y+4z=0,且x,y,z都不为0,求（3x*x+y*y+4z*z）/（5x*x+y* 已知x:y:z=3:4:5,3x+2y-4z=18.求：x+y+z. 试证明(x+y-2z)+(y+z-2x)+(z+x-2y)=3(x+y-2z)(y+z-2x)(z+x-2y) {2x+3y-4z=-5 x+y+z=6 x-y+3z=10 x/3=y/4=z/5,求x+y+z/3x-2y+z的值,