1.（x/4)^2+(56-x/4)^2=1002.（x/4)^2+(56-x/4)^2=1963.（x/4)^2+(56-x/4)^2=2004.10t+3t^2=2005.(92-2x)(60-x)=885乘以66.x^2+(x+1)^2=7^27.(100+x)（1000-2x)=1000乘以100乘以（1+百分之15点2）
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