(y-6)(x-12)-搜答案-智慧作业帮

平方的意思再问：你确定吗再答：那个符号带数字几，就是几次方再答：确定

解析：令x+y=m,x-y=n,那么原方程组可化为：{2分之m+3分之n=6（1）{2m+n=12（2）（1）×6可得：3m+2n=36（3）（2）×2可得：4m+2n=24（4）（4）-（3）可得：

把（y-x)转化成-(x-y)哦、了解了-(x-y)=-x+y=y-x比喻-(5-3)=-5+3=3-5=-2上面那个（X-Y)^2=（y-x）^2因为是平方（X-Y)^2=[-（y-x)]^2=（-

6(x-y)的三次方+12(x-y)的平方-3(y-x)的平方=6(x-y)³+12(x-y)²-3(x-y)²=6(x-y)³+9(x-y)²=3(

x+y+z-6=02x+3y-z-12=02x-y-z=0组成方程组再解x=2y=3z=1

(x-y)^2*(y-x)^2*(x-y)^6=(x-y)^2*(x-y)^2*(x-y)^6=(x-y)^10再问：能详细一点吗?我,初一的再答：(x-y)^2=(y-x)^2=(x-y)^2*(x

6x^4y^3+12x^3y^4-24x^2y^5提取6x^2y^3=6x^2y^3(x^2+2xy-4y^3)

(x+y)-(2x+y/2)-(3x+y/6)-(4x+y/12)-(5x+y/20)-……-(10x+y/90)=x-2x-3x-4x-..-10x+y*(1-1/2-1/6-1/12-..1/90

(x-y)x^6+(y-x)y^6=(x-y)x^6-(x-y)y^6=(x-y)(x^6-y^6)=(x-y)(x³+y³)(x³-y³)=(x-y)(x+y

x(x+y+z)=6(1)y(x+y+z)=12(2)z(x+y+z)=18(3)(1)/(2)x/y=1/2y=2x(1)/(3)x/z=1/3z=3xx(x+2x+3x)=66x^2=6x=1y=

设a=x+y,b=x-y原方程组为：a/2+b/3=6,即3a+2b=36,即：12a+8b=1444a-5b=12,即：12a-15b=36相减得：23b=108,得：b=108/23,再得：a=1

另一个类似的.设x－y=m,则因x、y满足x²＋y²－4x＋6y＋12=0就是(x－2)²＋(y＋6)²=1直线x－y=m到圆(x－2)²＋(y＋6)

x+y+z=-7①x-y=12②x+y-z=6③①+③2(x+y)=-1x+y=-0.5④②+④2x=11.5x=5.75∴y=-0.5-5.75=-6.25z=5.75-6.25-6=-6.5即：方

好好看哦,绝对最简单!

∵x²-y²=12∴(x+y)(x-y)=12∵x+y=6…………①∴x-y=2…………②①+②得2x=8x=4把x=4代入①得4+y=6y=2∴x=4,y=2很高兴为您解答,祝你

X+Y=12,X和Y(不成)比例;6分之X和Y分之5,X和Y(反)比例对我的回答有不明白的可以追问!

楼上配方不对呀x²+y²-4x-6y+12=0.配方得：(x-2)²+(y-3)²=1表示以C(2,3)为圆心,1为半径的圆设圆上点P(x,y)那么|PO|=√

(x+y)-(2x+1/2y)-(3x+1/6y)-(4x+1/12y)-(5x+1/20y)-.-(10x+1/90y)=x+y-2x-1/2y--3x-1/6y-4x-1/12y-5x-1/20y

|x|+y=12,x+|y|=6x>=0时,x+y=12x+|y|=6,|y|-y=-6,无解x