Resolva as seguintes equações quadráticas: x² - 10x + 16 = 0 - x² + 3x - 2 = 0 x² - 18 = 0?
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x² - 10x + 16 = 0 - x² + 3x - 2 = 0 x² - 18 = 0
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x² - 10x + 16 = 0 - x² + 3x - 2 = 0 x² - 18 = 0
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x² - 10x + 16 = 0
d² = 100 - 64 = 36
d = 6
x1 = (10 + 6)/2 = 8
x2 = (10 - 6)/2 = 2
-x² + 3x - 2 = 0
x² - 3x + 2 = 0
d² = 9 - 8 = 1
d = 1
x1 = (3 + 1)/2 = 2
x2 = (3 - 1)/2 = 1
x² - 18 = 0
x² = 18
x1 = 3√2
x2 = -3√2
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