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2013-02-19T17:09:22+01:00

3/x = 2x + 1 il faut x différent de 0

3 = 2x² + x

2x² + x - 3 = 0

delta = 1 + 24 = 25

x = (-1 +5)/4 =  ou x = (-1-5)/4 = -3/2

 

(2-x)³ = 27.10^(-3) => 2-x = 3.10^(-1)

2-x = 0,3 => x = 1,7