Question

×2-5×-84=6 formula cuadrática

Answer 1

Respuesta:

x₁ =  12.31

x₂ = - 7.31

Explicación paso a paso:

Primero simplificamos

x² - 5x - 84 = 6

x² - 5x - 84 - 6 = 0

x² - 5x - 90 = 0

Los coeficientes son :  a = 1  ;  b = - 5  ;  c = - 90

x₁,₂ = - ( - 5 ) ± √ ( - 5 )² - 4 ( 1 ) ( - 90 ) / 2 ( 1 )

x₁,₂ = + 5 ± √ 25 + 360 / 2

x₁,₂ = 5 ± √ 385 / 2

x₁,₂ = 5 ± 19.62 / 2

x₁ = 5 + 19.62/2

x₁ = 24.62/2

x₁ = 12.31

x₂ = 5 - 19.62/2

x₂ = - 14.62/2

x₂ = - 7.31