1/5X^2-2=5

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Solution for 1/5X^2-2=5 equation: 


X in (-oo:+oo)

(1/5)*X^2-2 = 5 // - 5

(1/5)*X^2-5-2 = 0

1/5*X^2 = 7 // : 1/5

X^2 = 35

X^2 = 35 // ^ 1/2

abs(X) = 35^(1/2)

X = 35^(1/2) or X = -35^(1/2)

X in { 35^(1/2), -35^(1/2) }

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