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3x²-x/2
3(6)²-6/2=
108-3=105
3x² - x /2 Para x = 6
3(6)² - 6/2 =
3 * 36 - 3 =
108 - 3 =
105
Pero si es:
(3x² - x)/2 =
(3 * 6² - 6)/2 =
(3 * 36 - 6)/2
(108 - 6)/2 =
102/2 =
51