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D( x )
2*x^2 = 0
2*x^2 = 0
2*x^2 = 0
2*x^2 = 0 // : 2
x^2 = 0
x = 0
x in (-oo:0) U (0:+oo)
(6*x^2*y^4-(12*x^4*y^2))/(2*x^2) = 0
(6*x^2*y^4-12*x^4*y^2)/(2*x^2) = 0
6*x^2*y^4-12*x^4*y^2 = 0
6*x^2*y^2*(y^2-2*x^2) = 0
-2*x^2 = -y^2 // : -2
x^2 = (y^2)/2
x^2 = (y^2)/2 // ^ 1/2
abs(x) = y/(2^(1/2))
x = y/(2^(1/2)) or x = -(y/(2^(1/2)))
6*x^2*y^2*(x-2^(-1/2)*y)*(x+(1/(2^(1/2)))*y) = 0
(6*x^2*y^2*(x-2^(-1/2)*y)*(x+(1/(2^(1/2)))*y))/(2*x^2) = 0
( 6*x^2*y^2 )
6*x^2*y^2 = 0 // : 6*y^2
x^2 = 0
x = 0
( x+(1/(2^(1/2)))*y )
x+(1/(2^(1/2)))*y = 0 // - (1/(2^(1/2)))*y
x = -((1/(2^(1/2)))*y)
x = -(y/(2^(1/2)))
( x-2^(-1/2)*y )
x-2^(-1/2)*y = 0 // + -2^(-1/2)*y
x = -(-2^(-1/2)*y)
x in { 0}
x in { -(y/(2^(1/2))), -(-2^(-1/2)*y) }
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