(3x-1)²=(3x-1) * (3x+1)oblicz i sprawdź
(3x-1)²=(3x-1) * (3x+1)
9x² - 6x + 1 = 9x² + 3x - 3x - 1
9x² - 9x² - 6x = -1 - 1
-6x = -2 /:(-6)
x = 2/6
x = 1/3
(3 * 1/3 - 1)² = (1 - 1)² = 0
(3 * 1/3 - 1)(3 * 1/3 + 1) = (1 - 1)(1 + 1) = 0 * 2 = 0
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(3x-1)²=(3x-1) * (3x+1)
9x² - 6x + 1 = 9x² + 3x - 3x - 1
9x² - 9x² - 6x = -1 - 1
-6x = -2 /:(-6)
x = 2/6
x = 1/3
(3 * 1/3 - 1)² = (1 - 1)² = 0
(3 * 1/3 - 1)(3 * 1/3 + 1) = (1 - 1)(1 + 1) = 0 * 2 = 0