x^2+3/4x^2=19^2

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Solution for x^2+3/4x^2=19^2 equation: 


x in (-oo:+oo)

x^2+(3/4)*x^2 = 19^2 // - 19^2

x^2+(3/4)*x^2-19^2 = 0

7/4*x^2 = 361 // : 7/4

x^2 = 1444/7

x^2 = 1444/7 // ^ 1/2

abs(x) = (1444/7)^(1/2)

x = (1444/7)^(1/2) or x = -(1444/7)^(1/2)

x in { (1444/7)^(1/2), -(1444/7)^(1/2) }

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