carauj050 carauj050
  • 07-12-2018
  • Mathematics
contestada

find a comples solution of 2x^2+x+6=0 (if there is more than ine solution separate them with commas)

Respuesta :

wegnerkolmp2741o
wegnerkolmp2741o wegnerkolmp2741o
  • 07-12-2018

Answer:

x = -1/4 + sqrt(47)/4 i  , -1/4 - sqrt(47)/4 i

Step-by-step explanation:

2x^2+x+6=0

using the quadratic formula

-b ±sqrt(b^2 -4ac)

--------------------------

 2a

-1 ±sqrt(1 -4(2)(6))

--------------------------

  2(2)

-1 ±sqrt( 1 - 48)

------------------

   4

-1 ± sqrt(-47)

-------------

     4

-1 ± sqrt(-1) sqrt(47)

-------------------------

    4

remember sqrt(-1) = i

-1 ± i sqrt(47)

----------------

  4

x = -1/4 + sqrt(47)/4 i  , -1/4 - sqrt(47)/4 i

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