Check whether given equation is quadratic or not $x^{2} - 2 x - \sqrt{x} - 5 = 0$

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Solution

Standard format of quadratic eqn :-
${A x}^{2} + B x + C = 0; (A, B, C ϵ R)$
So, $x^{2} - 2 x - \sqrt{x} - 5 = 0$
It's not quadratic equation.

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