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R in (-oo:+oo)
R^2 = 100/3.14 // - 100/3.14
R^2-(100/3.14) = 0
R^2-31.84713376 = 0
1*R^2 = 31.84713376 // : 1
R^2 = 31.84713376
R^2 = 31.84713376 // ^ 1/2
abs(R) = 31.84713376^(1/2)
R = 31.84713376^(1/2) or R = -31.84713376^(1/2)
R in { 31.84713376^(1/2), -31.84713376^(1/2) }
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