suan ti(x+3y-2z)(x+3y+2z)-(x-2y+3z)(x+2y+3z)求guo c

suan ti(x+3y-2z)(x+3y+2z)-(x-2y+3z)(x+2y+3z)求guo c ji suan:∫(x^2+1/2x^3)dx 试证明(x+y-2z)+(y+z-2x)+(z+x-2y)=3(x+y-2z)(y+z-2x)(z+x-2y) 已知(x+y)(x+z)=x,(y+z)(y+x)=2y,(z+x)(z+y)=3z,求x,y,z 化简-(-3x-y+2z)-{-x+【4x-(x-y-z)-3x+2z} 2(x+y)(x+y-z)+3(y-z)(x+y-z) (x-3y+2z)(x+3y-2z) （x-2y+3z)(x+2y-3z) (2y-x-3z)(-x-2y-3z) shuxue de ti mu1、已知a:c=3：2,b:c=4:3,求a:b:c2、已知X：y=1又2分之1：6分之5,y:z=0.5:0.4,求x:y:z 2(x+y-z)-3(x-y+z)-5(x+y-z)+6(x-y+z) 计算 证明 ：x/(y+z)+y/(z+x)+z/(x+y)>=3/2其中 x,y,z>0 1.（x+y-z)+(x-y+z)-(x-y-z) 2.2x-(3x-2y+3)-(5y-2) (x+3y-2z)(x-3y-2z)-(x+3y-2z)^2 x/2=y/3=z/5 x+3y-z/x-3y+z x+2y=3x+2z=4y+z 求x:y:z x+y/2=z+x/3=y+z/4 x+y+z=27 数学--整式运算4(x-y+z)-2(x+y-z)-3(-x-y-z)