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Donde: a = 1; b = 15; c = 56
X1 = [-15 + 1]/2 = -14/2 = -7
X2 = [-15 - 1]/2 = -16/2 = -8
X1 = -7; X2 = -8
2) 2X² - 6X + 4 = 0 (simplifico entre 2)
X² - 3X + 2 = 0
Donde: a =1; b = -3 c = 2
X1 = [3 + 1]/2 = 4/2 = 2
X2 = [3 - 1]/2 = 2/2 = 1
X1 = 2; X2 = 1
3) X² + 8X + 16 = 0
Donde: a = 1; b = 8; c = 16
X = -8/2 = -4
X = -4
4) 3X² - 14X + 8 = 0
Donde: a = 3; b = -14; c = 8
X1 = [14 + 10]/6 = 24/6 = 4
X2 = [14 - 10]/6 = 4/6 = 2/3
X1 = 4; X2 = 2/3