Question

Encontre as raízes reais que formam o conjunto solução da equação do segundo grau: x² + 5x - 14 = 0

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Answer 1

Resposta:

$x=2$

Explicação passo-a-passo:

$2^{2} +5.2-14=0$

$4+10-14=0$

$14-14=0$

$x=2$

$\pink{\boxed{\green{\boxed{S=\{(2)\}}}}$

Answer 2

Bom Dia !!!

s = {-7 ,2}

Coeficientes :

a = 1

b = 5

c = - 14

Δ = b² - 4.a.c

Δ = 5² - 4.1.(-14)

Δ = 25 + 56

Δ = 81

$x = \frac{-b\pm\sqrt{\Delta} }{2.a} \\\\x = \frac{- 5\pm 9}{2} \\\\x' = \frac{-5 - 9}{2} \\\\x' = \frac{- 14}{2}\\\\x' = -7\\\\x" = \frac{-5+9}{2} \\\\x" = \frac{4}{2} \\\\x" = 2$

s = {-7 ,2}

Espero ter ajudado :-)

Att: LDC