若实数x,y满足(x-y-5)²+│2x+3y+20│=20,求3x+2y+1的值.
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若实数x,y满足(x-y-5)²+│2x+3y+20│=20,求3x+2y+1的值.
同上:若实数x,y满足(x-y-5)²+│2x+3y+20│=20,求3x+2y+1的值.
同上:若实数x,y满足(x-y-5)²+│2x+3y+20│=20,求3x+2y+1的值.
![若实数x,y满足(x-y-5)²+│2x+3y+20│=20,求3x+2y+1的值.](/uploads/image/z/15772793-41-3.jpg?t=%E8%8B%A5%E5%AE%9E%E6%95%B0x%2Cy%E6%BB%A1%E8%B6%B3%28x-y-5%29%26sup2%3B%2B%E2%94%822x%2B3y%2B20%E2%94%82%3D20%2C%E6%B1%823x%2B2y%2B1%E7%9A%84%E5%80%BC.)
此题等式右边应该是0吧,不然此题就有无数组解.如果是0的话,由(x-y-5)²≥0,│2x+3y+20│≥0知,要使等式成立必有(x-y-5)²=0且│2x+3y+20│=0,那么3x+2y+1=-14
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