2/21-4/15x^2

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Solution for 2/21-4/15x^2 equation: 


x in (-oo:+oo)

2/21-((4/15)*x^2) = 0

(-4/15)*x^2+2/21 = 0

-4/15*x^2 = -2/21 // : -4/15

x^2 = 5/14

x^2 = 5/14 // ^ 1/2

abs(x) = (5/14)^(1/2)

x = (5/14)^(1/2) or x = -(5/14)^(1/2)

x in { (5/14)^(1/2), -(5/14)^(1/2) }

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