用配方法证明:x²-8x+22的值恒大于0 x²-8x+22>0 (x-4)>-6 -
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![用配方法证明:x²-8x+22的值恒大于0 x²-8x+22>0 (x-4)>-6 -](/uploads/image/z/1252974-30-4.jpg?t=%E7%94%A8%E9%85%8D%E6%96%B9%E6%B3%95%E8%AF%81%E6%98%8E%EF%BC%9Ax%26%23178%3B-8x%2B22%E7%9A%84%E5%80%BC%E6%81%92%E5%A4%A7%E4%BA%8E0+x%26%23178%3B-8x%2B22%3E0+%28x-4%29%3E-6+-)
用配方法证明:x²-8x+22的值恒大于0 x²-8x+22>0 (x-4)>-6 -
用配方法证明:x²-8x+22的值恒大于0 x²-8x+22>0 (x-4)>-6
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用配方法证明:x²-8x+22的值恒大于0 x²-8x+22>0 (x-4)>-6 -
x²-8x+22
=x²-8x+16+6
=(x-4)²+6>0
得证
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