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rezolvati in z ( 3x-1)la a 2a = (3x-1)(3x+1)

Răspuns :

Răspuns:

Deci....

[tex](3x - 1) {}^{2} = (3x - 1)(3x + 1) \\ 9x {}^{2} - 6x + 1 = 9x {}^{2} - 1 \\ - 6x + 1 = - 1 \\ - 6x = -1 - 1 \\ - 6x = - 2 \\ x = \frac{1}{3} [/tex]

Succes....