4n2-25 = 0
4n2=25
n2=6.25
n=sqrt(6.25)
n= +2.5 or -2.5
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8 x 0 =4n 0 = 4n 0=n
x: x2 - 81 = 0
y=±√15
16
In order to solve this equation you need to know what -28x-2 equals. If you were to assume it was 0 then x = 0.071 rounded