作业帮6²-x²=5²-（5-x）²
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6²-x²=5²-（5-x）²
6²-x²=5²-（5-x）²
6²-x²=5²-（5-x）²
36-x^2=25-(x^2-10x+25)
36-x^2=-x^2+10x
36=10x
x=3.6
x=3.6
36-x^2=25-25+10x-x^2
10x=36
x=18/5
36-x²=25-(25-10x+x²)