a^2/4=9

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Solution for a^2/4=9 equation: 


a in (-oo:+oo)

(a^2)/4 = 9 // - 9

(a^2)/4-9 = 0

1/4*a^2 = 9 // : 1/4

a^2 = 36

a^2 = 36 // ^ 1/2

abs(a) = 6

a = 6 or a = -6

a in { 6, -6 }

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