Check whether $x^{3} - 10 x + 74 = 0$ is a quadratic equation.

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Solution

We know that the general form of quadratic equation is $a x^{2} + b x + c = 0$ .

The given equation is $x^{3} - 10 x + 74 = 0$ in which the variable $x$ has highest degree $3$ and therefore it is not of the form $a x^{2} + b x + c = 0$ .

Hence, the equation $x^{3} - 10 x + 74 = 0$ is not a quadratic equation.

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