marshallellison marshallellison

07-06-2017
Mathematics

contestada

Solve this quadratic equation using the quadratic formula.

x2 + 8x - 5 = 0

Respuesta :

09-06-2017

x^2 + 8x - 5 = 0
a = 1, b = 8, c = -5
x = ( - 8 + - sqrt(64 - 4*1*-5))/2
x = ( -8 + - sqrt(64+20))/2
x = ( -8 + - sqrt (84))/2
x = ( - 8 + - 2sqrt21))/2
x = -4 + - sqrt21

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