(X+Z)(X-Z)+x(X+2Y)怎么解?

来源：学生作业帮编辑：大师作文网作业帮分类：数学作业时间：2024/11/19 17:13:02

方程写完了吗,没有有等于号的话此方程有无数个解
再问：不好意思。题出错了。是(y+z)(y-z)+x(x+2y)是这个。怎么解？按你的方法能得到（x-y-z)(x-y+z)
再答：用平方差公式算出（y+z）（y-z）=y²-z² 然后把x（x+2y）去括号得x²+2xy (y+z)(y-z)+x(x+2y)就等于 =y²-z²+x²+2xy =x²+2xy+y²-z² =（x+y）²-z² 然后用平方差的逆定理a²-b²=（a+b）（a-b） =（x+y+z）（x+y-z）懂了吗答案不是（x-y-z)(x-y+z)

（x+y+z)(-x+y+z)(x-y+z)(x+y-z)怎么算 (y-x)/(x+z-2y)(x+y-2z)+(z-y)(x-y)/(x+y-2z)(y+z-2x)+(x-z)(y-z x,y,z正整数 x>y>z证明 x^2x +y^2y+z^2z>x^(y+z)*y^(x+z)*z^(x+y) 化简(y-x)(z-x)/(x-2y+z)(x+y-2z)+（z-y)(x-y)/(x-2z+y)(y+z-2x)+(x (x-2y+z)(x+y-2z)分之（y-x)(z-x) + (x+y-2z)(y+z-2x)分之(z-y)(x-y) 化简(y-x)(z-x)/(x-2y+z)(x+y-2z)+（z-y)(x-y)/(xy-2z)(y+z-2x)+(x- (x+y)+z,x+(y+z)英语怎么读 (x+y-z)(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) (x*x+y*y+z*z)-(X+Y+Z)=?excel公式怎么表达 matlab解方程怎么出错了[x,y,z]=('x^2-5*y^2+7*z^2+12=0 ','3*x*y+x*z-11 (x+y+z)^2-(x-y-z)^2