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2015-06-01T19:06:22+08:00

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I think you mean 'quadratic' equation:
A quadratic equation is shown as:
ax²+bx+c=0 where a is not equal to 0.

Therefore none of them are quadratic equations.
0
super duper thanks
Does the second one really have no equals sign?
yes
Ok, then it is the same
you say that all of this are not quadratic equation