(x-y+z)(x+y-z)计算
计算:(x+y+z)(-x+y+z)(x-y+z)(x+y-z).
①(x+y+z)(-x+y+z)(x-y+z)(x+y-z)
x分之y+z=y分之z+x=z分之x+y(x+y+z不等于0),求x+y+z分之x+y-z
运用乘法公式计算:(x+2y-3z)(x-2y+3z)
(x-y+z)(x+y+z)等于多少.
(x+y+z)(x-y-z)用完全平方公式计算
(x+y+z)*(-x+y+z)*(x-y+z)*(x+y-z)=
插值法计算公式已知▲X、▲Y、Z、X、Y用插值法求计算公式(▲X-▲Z)/(X-Z)=(▲Z-▲Y)/(Z-Y)的▲Z值
(x+y-z)-((x-y+z)的平方)计算
1.设X ,Y,Z 成等差数列,代数式(X-Z)*(X-Z)+ 4(X-Y)(Z-Y)=
x,y,z为正实数 x/(2x+y+z)+y/(x+2y+z)+z/(x+y+2z)
计算 (X+Y+Z)的平方