Explain why completing the square is not the most efficient method for solving 0=x^2-4. Choose the correct answer below. A.
Adding (b/2)^2
to both sides would create the equation 0=x^2, so it would be difficult to use completing the square.
B.
There is no x-term, so b and (b/2)^2
are both 0. Completing the square would involve adding 0 to both sides of the equation which would not change the original equation.
C.
The expression contains negative terms which means the geometric model cannot be used, making it difficult to complete the square.
D.
There is no y-term, so b and (b/2)^2
are both 0. Completing the square would involve adding 0 to both sides of the equation which would not change the original equation.