9-8x2/4+9

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Solution for 9-8x2/4+9 equation: 


x in (-oo:+oo)

9-((8*x^2)/4)+9 = 0

9-2*x^2+9 = 0

-2*x^2 = -18 // : -2

x^2 = 9

x^2 = 9 // ^ 1/2

abs(x) = 3

x = 3 or x = -3

x in { 3, -3 }

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