(2X+Y+1)(2X+Y-1) X为X,x为乘号快,急用!
来源:学生作业帮助网 编辑:六六作业网 时间:2025/02/07 17:00:27
(2X+Y+1)(2X+Y-1)X为X,x为乘号快,急用!(2X+Y+1)(2X+Y-1)X为X,x为乘号快,急用!(2X+Y+1)(2X+Y-1)X为X,x为乘号快,急用!原式=[(2X+Y)+1]
(2X+Y+1)(2X+Y-1) X为X,x为乘号快,急用!
(2X+Y+1)(2X+Y-1) X为X,x为乘号
快,急用!
(2X+Y+1)(2X+Y-1) X为X,x为乘号快,急用!
原式=[(2X+Y)+1][(2X+Y)-1]
=(2X+Y)^2-1^2
=4X^2+4XY+Y^2-1
(^2为平方)
又及:利用平方差公式)
(2X+Y+1)(2X+Y-1) X为X,x为乘号快,急用!
[(-x-y)(-x+y)-(x+y)^2-x(y-y^2)}÷1/2y
(x/x+y-x/y-x-2xy/x.x-y.y)/(1/x-1/y) 分式化简
1、y-x/x²-y²2、(x-y)(y-z)(z-x)/(z-y)(y-x)(x-z)
x²/xy-x/y 3x/4x+y - x-2y/4x+y (1-y/y+x)÷x/y²-x²
化简 3x(x^2-x-1)-(x+1)(3x^-x) X^3(x-y)+x(y-x)
(x-y)(2x-y-1)
简化|x-y+1|-2|y-x-3|+|y-x|+5其中y为负数,x为正数
x为正数,y为负数,去绝对值号,/x-y+1/-2/y-x-3/+/y-x/+5
y=(x-1/x)/2反函数为y=x+(x^2+1)^0.5
已知x+y=a,2x-y=-2a,求[(x/y-y/x)/(x+y)-x(1/x-1/y)]/[(x+1)/y]的值
若2/x-1/y=3,求[y/x-y/x-y(x-y/x-x+y)]/x-2y/x的值
x+y=1 则x^2/(x+2)+y^2/(y+1)最小值为?
已知X+Y=4018,X—Y=1/2,则-X*X+Y*Y的值为?
已知y=x-1,则代数式(x-y)2+y-x+1的值为
log4(x+2y)+log4(x-2y)=1,则|x|+|y|的最小值为
x,y为实数,证明x*2-xy+y*2>=x+y-1
若x+2y=1(x、y属于正整数)x+y的最小值为?