Question
The following are quadratic equations in x?
$\text{x}^2-3\text{x}-\sqrt{\text{x}}+4=0$
$\text{x}^2-3\text{x}-\sqrt{\text{x}}+4=0$
✓
Answer
$\text{x}^2-3\text{x}-\sqrt{\text{x}}+4$ is not a quadratic polynomial since it contains $\sqrt{\text{x}}$ or $\text{x}^{\frac{1}{2}}$ in which power $\frac{1}{2}$ of x is not an integer.
$\therefore\ \text{x}^2-3\text{x}-\sqrt{\text{x}}+4=0$ is a quadratic equation.
$\therefore\ \text{x}^2-3\text{x}-\sqrt{\text{x}}+4=0$ is a quadratic equation.
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