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there are 2 types of Quadratic Equations:

1) Standard form( ax2+bx+c=0 )

2) General Form ( ax2+bx+0 )

When solving quadratic equations your answer must be arranged depending on the given equation that is given to you.

example: ( standard form )

given equation is x-x2=7

1) You must arranged the given equation according of the form.

ans.

-x2+x-7

Take Note that when transferring the number that is behind of the equal sign will change it sign.