Angellidn
Answered

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are all quadratic equations can be solve by completing the square? justify

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.