Can all quadratics be solved by completing the square?

Completing the square is one method for solving a quadratic equation. A quadratic equation can also be solved by factoring, using the square roots or quadratic formula. Solving quadratic equations by completing the square will always work when solving quadratic equations

-You can also use division or even simply take a GCF, set the quantities( ) equal to zero, and subtract or add to solve for the variable