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Which of the following are quadratic equations?
$x^2\ -\ 3x\ =\ 0$
Given:
Given equation is $x^2\ -\ 3x\ =\ 0$.
To do:
We have to check whether the given equation is quadratic.
Solution:
The standard form of a quadratic equation is $ax^2+bx+c=0$.
$x^2\ -\ 3x\ =\ 0$
$x^2\ -\ 3x\ =\ 0$ is of the form $ax^2+bx+c=0$ where $a=1, b=-3$ and $c=0$.
Therefore, $x^2\ -\ 3x\ =\ 0$ is a quadratic equation.
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