作业帮化简2分之x y的平方
来源：学生作业帮助网 编辑：作业帮 时间：2024/07/02 16:06:51
2/xy=2(y-x)/xy(y-x)3y/(xy-x^2)=3y^2/xy(y-x)如果不懂,请追问,祝学习愉快!
你用文字表达出来的式子不太好理解,还是试着解了一下：2a的平方b-4b的平方分之-3a[2a²b-(-3a)]/(4b²)=(8a²b³)/(4b²)
=-(x+2y)(x-2y)/(x+y)²×2x(x+y)/(x-2y)=-2x(x+2y)/(x+y)=-(2x²+4xy)/(x+y)
(xy-x的平方）除以xy分之x的平方-2xy+y的平方乘x的平方分之x-y=x(y-x)*xy/(x-y)²*（x-y）/x²=-y再问：不好意思，打错了(xy-y的平方）除以x
x/y=7/2(x²-3xy+2y²)/(x²+2xy+y²)=[(x/y)²-3(x/y)+2]/[(x/y)²+2(x/y)+1]=[(
=(x-2y)(x-y)/(x-y)²=(x-2y)/(x-y)再问：做完啊。。。。。。再答：好了呀这个不可以再化简了，是一个最简分式了再问：刚刚不小心题目打掉了，你在看已知Y分之X等于7分
樱桃_小纯子：(x²-2xy+y²-1)/(x-y-1)=[(x-y)²-1]/(x-y-1)=[(x-y+1)(x-y-1)]/(x-y-1)=x-y+1
xy的平方·(-x的平方y的平方)·(2分之1xy的三次方)的平方=(xy)^2*(-x^2y^2)*(xy)^6/4=-(xy)^10/4=-[(xy)^2]^5/4=-2^5/4=-8
y分之x=2分之1y=2x所以原原式=(x²-2x²-8x²)分之（x²＋4x²＋4x²）=-9分之9=-1
x平方-3xy+2y平方=0(x-2y)(x-y)=0x=2yx=y(1)x=2y则xy分之x平方+y平方的值=((2y)^2+y^2)/(2y*y)=(4y^2+y^2)/(2y^2)=5/2(1)
原式(-xy/3)²*[xy(2x-y)-2x(xy-y²)]=(x²y²/9)(2x²y-xy²-2x²y+2xy²)
3x²y-{2xy-2(xy-3/2x²y)}+xy=3x²y-{2xy-2xy+3/2x²y}+xy=3x²y-2xy+2xy-3/2x²
原式=-(x+2)(x-2)分之xy(x-2)=-(x+2)分之xy
解(-3/4x²y-3/5xy²)(-2/3xy)²=(-3/4x²y-3/5xy²)(4/9x²y²)=-1/3x^4y
=-x³y+12x^4y^4-12x^4y^4=-x³y
(x-y)²/(xy)-(x²-y²)/(xy)=（2y²-2xy)/(xy)=(2y-2x)/x
2y-xy分之x的平方-2x=x（x-2）/y(2-x)=-x/y;很高兴为您解答,skyhunter002为您答疑解惑如果本题有什么不明白可以追问,
y分之x=2分之1y=2x所以原原式=(x²-2x²-8x²)分之（x²＋4x²＋4x²）=-9分之9=-1