I need help now this is missing for 2 weeks now

none of the above.

for one of the equations to be used in the process, there has to be a term in the equation since squared is .

since there is only a term in the first equation, we cannot derive a from completing the square.

solving with completing the square

yes the total will be same because in both of them the expression.is rearranged but their sign remains the same hence it hss just been shuffled