Bonjour
x^2 = 50
x^2 - 50 = 0
x^2 - (V50)^2 = 0
(x - V50)(x + V50) = 0
x - V50 = 0 ou x + V50 = 0
x = V50 ou x = -V50
x^2 = 4/9
x^2 - 4/9 = 0
x^2 - (2/3)^2 = 0
(x - 2/3)(x + 2/3) = 0
x - 2/3 = 0 ou x + 2/3 = 0
x = 2/3 ou x = -2/3
2x^2 = 32
x^2 = 32/2
x^2 = 16
x^2 - 16 = 0
x^2 - 4^2 = 0
(x - 4)(x + 4) = 0
x - 4 = 0 ou x + 4 = 0
x = 4 ou x = -4
x^2 = -100
Un carré est toujours positif donc pas de solution
x^2 - 18 = 0
x^2 - (3V2)^2 = 0
(x - 3V2)(x + 3V2) = 0
x - 3V2 = 0 ou x + 3V2 = 0
x = 3V2 ou x = -3V2
x^2 = 3600
x^2 - 3600 = 0
x^2 - (60)^2 = 0
(x - 60)(x + 60) = 0
x - 60 = 0 ou x + 60 = 0
x = 60 ou x = -60
x^2 = 2
x^2 - 2 = 0
x^2 - (V2)^2 = 0
(x - V2)(x + V2) = 0
x - V2 = 0 ou x + V2 = 0
x = V2 ou x = -V2
x^2 - 10 = 2
x^2 - 10 - 2 = 0
x^2 - 12 = 0
x^2 - (2V3)^2 = 0
(x - 2V3)(x + 2V3) = 0
x - 2V3 = 0 ou x + 2V3 = 0
x = 2V3 ou x = -2V3
