4x^2-x/2x-1=9

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Solution for 4x^2-x/2x-1=9 equation: 


x in (-oo:+oo)

4*x^2-((x/2)*x)-1 = 9 // - 9

4*x^2-((x/2)*x)-9-1 = 0

4*x^2+(-1/2)*x^2-9-1 = 0

7/2*x^2 = 10 // : 7/2

x^2 = 20/7

x^2 = 20/7 // ^ 1/2

abs(x) = (20/7)^(1/2)

x = (20/7)^(1/2) or x = -(20/7)^(1/2)

x in { (20/7)^(1/2), -(20/7)^(1/2) }

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