Add 7 to each side: 3n2 = 7
Divide each side by 3: n2 = 7/3
n = sqrt 7/sqrt 3, ie just over 1.5
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It is sqrt(0), which equals 0.
y = x + 0
4x - 11 = 0
(2x - 3)*(4x2 + 6x + 9) = 0
By inspection you should be able to see that this is a parabola with a vertex of this. (0, 0) There is no form for this function as there is no linear term.