Which one of the following methods cannot be used to solve the equation $x^{2}-4 x-8=0$ ?
A) Completing the square
B) Quadratic formula
C) Factoring
D) All of the methods can be used.

Question

Quizplus · Accepted Answer

The equation $x^{2}-4x-8=0$ does not factor nicely into integers, making factoring not a straightforward method for solving it, unlike completing the square or using the quadratic formula which are always applicable.

Which One of the Following Methods Cannot Be Used to Solve