Ax^2-2xy+y^2)-(-x^2+Bxy+2y^2)=5x^2-9+Cy^2恒成立的A,B,C的值依次是思路!Thank you!1(Ax^2-2xy+y^2)-(-x^2+Bxy+2y^2)=5x^2-9+Cy^2恒成立的A,B,C的值依次是

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Ax^2-2xy+y^2)-(-x^2+Bxy+2y^2)=5x^2-9+Cy^2恒成立的A,B,C的值依次是思路!Thankyou!1(Ax^2-2xy+y^2)-(-x^2+Bxy+2y^2)=5

Ax^2-2xy+y^2)-(-x^2+Bxy+2y^2)=5x^2-9+Cy^2恒成立的A,B,C的值依次是思路!Thank you!1(Ax^2-2xy+y^2)-(-x^2+Bxy+2y^2)=5x^2-9+Cy^2恒成立的A,B,C的值依次是
Ax^2-2xy+y^2)-(-x^2+Bxy+2y^2)=5x^2-9+Cy^2恒成立的A,B,C的值依次是
思路!Thank you!1
(Ax^2-2xy+y^2)-(-x^2+Bxy+2y^2)=5x^2-9+Cy^2恒成立的A,B,C的值依次是

Ax^2-2xy+y^2)-(-x^2+Bxy+2y^2)=5x^2-9+Cy^2恒成立的A,B,C的值依次是思路!Thank you!1(Ax^2-2xy+y^2)-(-x^2+Bxy+2y^2)=5x^2-9+Cy^2恒成立的A,B,C的值依次是
(Ax^2-2xy+y^2)-(-x^2+Bxy+2y^2)=5x^2-9+Cy^2恒成立的A,B,C的值依次是
（A+1）x²-（2+B）xy-y²=5x^2-9+Cy^2;
∴A+`1=5;
2+B=9;
C=-1;
∴A=4;B=7;C=-1;
很高兴为您解答,skyhunter002为您答疑解惑
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(Ax^2-2xy+y^2)-(-x^2+Bxy+2y^2)=5x^2-9+Cy^2
Ax^2-2xy+y^2+x^2-Bxy-2y^2=5x^2-9+Cy^2
(A+1)x^2-(2+B)xy-y^2=5x^2-9+Cy^2
所以A+1=5
2+B=9
-1=c
所以
A=4
B=7
C=-1

x^2+2xy+y^2-ax-ay x的平方-2xy+y的平方+ax-ay 2/xy=( )/2ax²y² x³-xy²/(x-y)²=x( )/x-y x²+ax²+x+ax-1-a因式分解x²+7x-86x^2-7xy+2y 多项式ax-ay,x^2-y^2,x^2-2xy+y^2的公因式是 x^2-xy/xy-y^2约分（x^2+xy/x-y)/（xy/x-y)计算分解因式2x^2+4xy-6ax+3a-x-2y 2x的2次方+4xy-6ax+3a-x-2y 因式分解（ax^2-2xy+y^2)-(-ax^2+bxy+2y^2)=6x^2-9xy+cy^2成立则a= b= c= (-x-y)(x^2+xy+y^2) 若(ax²-2xy+y²)-(-ax²+bxy+2y²)=6x²-9xy+cy²成立,abc的值非别是多少? 若(ax²-2xy+y²)-(-ax²+bxy+2y²)=8x²-7xy-cy²成立,则a,b,c的值 (ax²-2xy+y²)-(-ax²+bxy+2y²)=8x²-7xy-cy²成立,求a,b,c. 化简x^-y^/x^-2xy+y^ 2*(x-y)²(y-x)(xy) .(x+y-2)(x+y-2xy)+(xy-1)^2 (x^2-xy)y÷y-x/xy怎么做?