Question

x²+7x+12= qual a resposta
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Answer 1

Explicação:

x² - 7x + 12 = 0

a = 1

b = -7

c = 12

x=\frac{-b \pm \sqrt{b^{2}-4ac}}{2a}x=2a−b±b2−4ac

x=\frac{-(-7) \pm \sqrt{(-7)^{2}-4.1.12}}{2.1}x=2.1−(−7)±(−7)2−4.1.12

x=\frac{7 \pm \sqrt{1}}{2}x=27±1

x' = (7+1)/2 = 8/2 = 4

x'' = (7-1)/2 = 6/2 = 3