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Sagot :
Not all because we have different methods in factoring quadratic equations.
No, not all can be solved by completing the square because this method requires the presence of the [tex]bx[/tex] term from [tex]a x^{2} +bx+c=0[/tex].
For example, we can not use completing the square for [tex] x^{2} -9 =0[/tex] because it does not have the middle term. However, this kind of equation may be easily solved using different methods such as extracting the square roots, etc.
For example, we can not use completing the square for [tex] x^{2} -9 =0[/tex] because it does not have the middle term. However, this kind of equation may be easily solved using different methods such as extracting the square roots, etc.
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