若x的平方 2xy y的平方-8y 17=0, 求x的y次方的值
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x²-2x+y²+8y+17=x²-2x+y²+8y+1+16=x²-2x+1+y²+8y+16=(x-1)²+(y+4)
X²-2X+Y²+6Y+10=0X²-2X+1+Y²+6Y+9=0(X-1)²+(Y+3)²=0X-1=0,X=1;Y+3=0,Y=-3(2
x平方+3y平方-2等于8x²+3y²-2=8两边同时乘以55x²+15y²-10=405x²+15y²=505x平方+15y平方+215x
先将96=3*2*2*2*2*2然后组合成12*8=96xxy+yyx=xy(x+y)=12*8=2*6*(2+6)=12*8=96x=2,y=6xx+yy=2*2+6*6=4+36=40
=x²/2(y的4次方-16)=x²/2(y²+4)(y²-4)=x²/2(y²+4)(y+2)(y-2)
令x的平方+y的平方=m则m(m-2)=8m^2-2m-8=0(m-4)(m+2)=0m=4或m=-2(舍去)则x^2+y^2=4
题目是√x^3+X^2y+1/4xy+√(1/4x^3)-X^2y+xy^2如果是:√x^3+X^2y+1/4xy+√(1/4x^3)-X^2y+xy^2=(3/2)√x^3+xy/4+xy^2=(3
((x-y)(x-y))/((x-y)(x+y))=(x-y)/(x+y).
|Y-2|+(X-1)平方=0而|Y-2|>=0;(X-1)平方>=0所以只能等于0,即y=2,x=1x立方-x平方y+xy平方+x平方y-xy平方-y立方=1-2+4+2-4-8=-7
原式=-2x²y^6+20x²y³再问:还在吗再答:嗯有新的题请采纳我,重新问再问:(x+3y)(2x-y)谢谢再答:采纳我,重新问
{(x的平方+y的平方)-(x的平方-y的平方)+2y(x-y)}除4y=(2y^2+2y(x-y)/(4y)=2xy/(4y)=x/2
【2(x-y)²-8(x-y)²(x+y)+6y(x-y)²】÷2(x-y)²=2(x-y)²÷2(x-y)²-8(x-y)²(x
x的平方乘y的平方-4-2x的平方乘y的平方=-x的平方乘y的平方-4
∵4x²-y²+2x-y=(2x-y)(2x+y)+(2x-y)=(2x-y)(2x+y+1)∴4x²-y²+2x-y=(2x-y)(2x+y+1)不懂得欢迎追
x²+2x+y²-8y+17=0x²+2x+1+y²-8y+16=0(x+1)²+(y-4)²=0∴﹛x+1=0y-4=0x=-1,y=4x
由题意可得:(2xy-y²)/(x²-y²)+(x-y)/(x+y)=[(2xy-y²)+(x-y)²]/(x²-y²)=x
3x²-4xy+y²=-3①2x²+3xy-2y²=8②3×①-2×②3(3x²-4xy+y²)-2(2x²+3xy-2y
x的平方-x-4y的平方+2y=(x-2y)(x+2y)-(x-2y)=(x-2y)(x+2y-1)
(x平方+2xy+y的平方)/(x+y)=(x+y)²/(x+y)=x+y
x的平方-2y+y的平方+8y+17=0(x-1)平方+(y+4)平方=0x=1,y=-4