Question

Check whether the following are quadratic equations or not.
1
$x - \frac{3}{x} = {x}^{2}$
2
${x}^{2} - 3x = 0$
3
${x}^{2} + 6x - 4 = 0$
4
$\sqrt{3} {x}^{2} - 2x + \frac{1}{2} = 0$
5
(2 x + 1 )(3 x + 2 )=6 (x -1)( x - 2 )
6
${x}^{2} + \frac{1}{x {}^{2} } = 5$
7
$(x + \frac{1}{x} ) {}^{2} = 3(x + \frac{1}{x} ) + 4$

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Answer 1

Answer:

1234567..... I don't understand.....