30-01-2017
Mathematics

contestada

2n^2 - 20
n= 5
?????

Respuesta :

Rola100 Rola100

30-01-2017

2n^2-20=0
2n^2=20
n^2=20÷2
n^2=10
n=radical 10

Answer Link

Norbix9 Norbix9

30-01-2017

Use this:

n1,2 = -b +- √b²-4*a*c / 2a

a = 2n (2)
b = -20
c = -5 (you have to subtract 5 to get 0)

Answer Link

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