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2^2*x+5 = 1/2048 // - 1/2048
2^2*x-(1/2048)+5 = 0
2^2*x-1/2048+5 = 0
4*x+10239/2048 = 0 // - 10239/2048
4*x = -10239/2048 // : 4
x = -10239/2048/4
x = -10239/8192
x = -10239/8192
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