2003(x+y)²与2002│1/2 -1│为相反数,则xy=?
来源:学生作业帮助网 编辑:作业帮 时间:2024/08/30 19:26:45
![2003(x+y)²与2002│1/2 -1│为相反数,则xy=?](/uploads/image/z/14299762-58-2.jpg?t=2003%EF%BC%88x%2By%EF%BC%89%26sup2%3B%E4%B8%8E2002%E2%94%821%EF%BC%8F2+%EF%BC%8D1%E2%94%82%E4%B8%BA%E7%9B%B8%E5%8F%8D%E6%95%B0%2C%E5%88%99xy%3D%3F)
x)3200~BN#';F4o~O!dǮw<}6uӎ6IE_`g3 k}si;tΧ
{l
:^ճ9g5=/m~vE3 nmk`mo[ 5OM)XW($+@&@^u@ 2
s_l_bga_\g
7 8
2003(x+y)²与2002│1/2 -1│为相反数,则xy=?
2003(x+y)²与2002│1/2 -1│为相反数,则xy=?
2003(x+y)²与2002│1/2 -1│为相反数,则xy=?
2003(x+y)²与2002│1/2 -1│为相反数
平方绝对值>=0
所以只有0的相反数是0满足此题
即x+y=0 ;1/2-y=0
解得x=1/2 ;y=1/2
所以xy=1/4
拟题目有问题哦
思路这样的
数学分式通分与约分约分 (x²+xy)/(x+y)² x²-y²/(x²-y²)通分2xy/(x+y)²与x/x²-y² x-y/2x+2y与xy/(x+y)²
分式的约分与通分问题约分 (x²+xy)/(x+y)² x²-y²/(x²-y²)通分2xy/(x+y)²与x/x²-y² x-y/2x+2y与xy/(x+y)²
1、计算2006²-2005²+2004²-2003²+2002²-.+2²-1²2、求证:无论x,y取何值,4x²-12x+9y²+30y+35
已知(x+y)²=1,(x-y)²=49,求x²+y²与xy的值
已知(x+y)²=25,(x-y)²=9,求xy与x²+y²的值.
因式分解 (x²+y²-1)²-4x²y²
求因式分解:(x²+y²)²-4x²y²
因式分解:x²-11x²y²+(y²)²
(x²+4y²)²-16x²y² 因式分解
分解公因式(X²+y²)²-x²y²
分解公因式 (x+y)²-2(x²-y²)+(x-y)²
(x+y)²-2(x²-y²)+(y-x)²
已知x的-1次方-y的-1次方成反比例.求证x不等于-y时,(x+y)²与x²+y²成正比例.
正整数x与y满足x²-y²=24,求xy(x+ y)的值
公式法(完全平方公式法) 并写出过程与结果!1.(x²-5)²+2(x²-5)+12.x²+xy+y²3.2x²-4x+24.x³-6x²+9x5.y³-4y²+4y6.x²y²+6xy+9
2003(x+y)²与2002│1/2 -1│为相反数,则xy=?
2003(x+y)²与2002│1/2 -1│为相反数,则xy=?
一道数学通分题2xy/(x+y)²与x/x²-y²