(2u^2-7)/(u+3)

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Solution for (2u^2-7)/(u+3) equation: 


D( u )

u+3 = 0

u+3 = 0

u+3 = 0

u+3 = 0 // - 3

u = -3

u in (-oo:-3) U (-3:+oo)

(2*u^2-7)/(u+3) = 0

2*u^2 = 7 // : 2

u^2 = 7/2

u^2 = 7/2 // ^ 1/2

abs(u) = (7/2)^(1/2)

u = (7/2)^(1/2) or u = -(7/2)^(1/2)

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

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