x+1/x=5 两边同时平方得x²+2+1/x²=25x²+1/x²=25-2x²+1/x²=23x+1/x=5 两边同时平方得x²+2+1/x²=25同时平方怎么做
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![x+1/x=5 两边同时平方得x²+2+1/x²=25x²+1/x²=25-2x²+1/x²=23x+1/x=5 两边同时平方得x²+2+1/x²=25同时平方怎么做](/uploads/image/z/2984144-32-4.jpg?t=x%2B1%2Fx%3D5+%E4%B8%A4%E8%BE%B9%E5%90%8C%E6%97%B6%E5%B9%B3%E6%96%B9%E5%BE%97x%26%23178%3B%2B2%2B1%2Fx%26%23178%3B%3D25x%26%23178%3B%2B1%2Fx%26%23178%3B%3D25-2x%26%23178%3B%2B1%2Fx%26%23178%3B%3D23x%2B1%2Fx%3D5+%E4%B8%A4%E8%BE%B9%E5%90%8C%E6%97%B6%E5%B9%B3%E6%96%B9%E5%BE%97x%26%23178%3B%2B2%2B1%2Fx%26%23178%3B%3D25%E5%90%8C%E6%97%B6%E5%B9%B3%E6%96%B9%E6%80%8E%E4%B9%88%E5%81%9A)
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x+1/x=5 两边同时平方得x²+2+1/x²=25x²+1/x²=25-2x²+1/x²=23x+1/x=5 两边同时平方得x²+2+1/x²=25同时平方怎么做
x+1/x=5 两边同时平方得x²+2+1/x²=25x²+1/x²=25-2x²+1/x²=23
x+1/x=5 两边同时平方得x²+2+1/x²=25同时平方怎么做
x+1/x=5 两边同时平方得x²+2+1/x²=25x²+1/x²=25-2x²+1/x²=23x+1/x=5 两边同时平方得x²+2+1/x²=25同时平方怎么做
(x+1/x)²
=x²+2*x*1/x+(1/x)²
=x²+2+1/x²