Question

Resolva as seguintes equações do 2° grau, identifique os coeficientes e determine as raízes se existir. A)x2- 5× + 6=0

Answer 1

Resposta ↓

Valor das raízes = {3, 2}

Explicação passo-a-passo:

Coeficiente a = valor acompanhado do x²

Coeficiente b = valor acompanhado do x

Coeficiente c = número sozinho

Coeficientes :

a = 1

b = - 5

c = 6

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Δ = b² - 4.a.c

Δ = (-5)² - 4.1.6

Δ = 25 - 24

Δ = 1

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$x = \cfrac{-b\pm\sqrt{\Delta} }{2.a} \\\\\\x = \cfrac{-(-5)\pm\sqrt{1} }{2.1} \\\\\\x = \cfrac{5\pm1}{2} \\\\\\x' = \cfrac{5 + 1}{2} \\\\\\x' = \cfrac{6}{2} \\\\\\x' = 3\\\\\\x" = \cfrac{5- 1}{2} \\\\\\x" = \cfrac{4}{2} \\\\\\x" = 2$