使(ax^2-2xy+y^2)-(-ax^2+bxy+cy^2)=6x^2-9xy+2y成立的a、b、c的值依次是多少?
来源:学生作业帮助网 编辑:作业帮 时间:2024/11/15 17:44:46
xQAK0+94¤4d.E/ͭ/
2 Iaؤcm
;sQ,cs / e 70OGV.nzɾsn0wUmߞL=OUusLia}7b'8~.{z=n.Ts0Y'@PzRaQ (Hxt8 thnI]6!#^K۵a Eq@7LP;_~mCYCK
使(ax^2-2xy+y^2)-(-ax^2+bxy+cy^2)=6x^2-9xy+2y成立的a、b、c的值依次是多少?
使(ax^2-2xy+y^2)-(-ax^2+bxy+cy^2)=6x^2-9xy+2y成立的a、b、c的值依次是多少?
使(ax^2-2xy+y^2)-(-ax^2+bxy+cy^2)=6x^2-9xy+2y成立的a、b、c的值依次是多少?
(ax^2-2xy+y^2)-(-ax^2+bxy+2y^2)
=2ax^2-(b+2)xy-y^2
=6x^2-9xy+cy^2 ;比较系数得到
2a=6; b+2=9; c= -1;
所以 a=3,b=7,c=-1.
(ax^2-2xy+y^2)-(-ax^2+bxy+cy^2)=6x^2-9xy+2y
ax^2-2xy+y^2+ax^2-bxy-cy^2=6x^2-9xy+2y
2ax^2+(-2-b)cy+(1-c)y^2=6x^2-9xy+2y
所以2a=6,
-2-b=-9,
1-c=2,
所以a=3,b=7,c=-1
(ax^2-2xy+y^2)-(-ax^2+bxy+cy^2)
=2ax^2-(b+2)xy+(1-c)y^2
=6x^2-9xy+2y^2
2a=6;
b+2=9;
1-c=2;
所以 a=3, b=7, c=-1.
若xy满足方程组{3ax+4y=9① 6ax+5y=27②,则2ax+8y=()
x^2+2xy+y^2-ax-ay
(ax^2 y^2-a)除以(xy+1) 在线等
因式分解 3ax-3ay+xy-y^2
x的平方-2xy+y的平方+ax-ay
使(ax^2-2xy+y^2)-(-ax^2+bxy+cy^2)=6x^2-9xy+2y成立的a、b、c的值依次是多少?
已知ax+by=7,ax^2+by^2=49,ax^3+by^3=133,ax^4+by^4=406.求:2001(x+y)+6xy-17/2(a+b)的值
已知ax+by=7,ax^2+by^2=49,ax^3+by^3=133,ax^4+by^4=406.求:2008(x+y)+2008xy+(a+b)/21
已知ax+by=7ax^2+by^2=49ax^3+by^3=133ax^4+by^4=406试求1995(x+y)+6xy-17/2(a+b)的值过程要详细已知ax+by=7,ax^2+by^2=49,ax^3+by^3=133,ax^4+by^4=406 试求1995(x+y)+6xy-17/2(a+b)的值
x²+ax²+x+ax-1-a因式分解x²+7x-86x^2-7xy+2y
2/xy=( )/2ax²y² x³-xy²/(x-y)²=x( )/x-y
(ax^2-2xy+y^2)-(-ax^2+bxy+2y^2)=6x^2-9xy+cy^2成立则a= b= c=
多项式ax-ay,x^2-y^2,x^2-2xy+y^2的公因式是
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.
因式分解8ax²--4ax+½a ½x²--xy+½y² (a²+2b)²--(2b+1)²
化简(a-b)²÷(ax+by-ay-xy)-(a-b)÷(x-y)第2个括号里的是ax+by-ay-bx