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silirobert15

2x² - 4x - 2 = 0                  <=>    2(x² - 2x - 1 ) = 0

<=>  2(x² - 2.x.1 - 1² ) = 0    <=>  2(x - 1)² = 0

<=>  (x - 1)² = 0/2 = 0          <=>  x - 1 = 0

<=>  x = 0 + 1 = 1

P/s: A² - 2AB + B² = (A - B)²

ANSWER: x = 1

Ok done. Thank to me :>

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