解方程:250+250(x+1)+250(x+1)方=843.6
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解方程:250+250(x+1)+250(x+1)方=843.6
解方程:250+250(x+1)+250(x+1)方=843.6
解方程:250+250(x+1)+250(x+1)方=843.6
250+250(1+x)+250(1+x)^2=843.6
250(1+x)^2+250(1+x)-500=93.6
250(x+1-1)(x+1+2)=93.6
x(x+3)=0.3744
(x+1.5)^2=2.6244
x+1.5=1.62
x=0.12