How to solve the equation

just try substituting t with the values given . the answer is B

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

it would open into a square depending on the type of envelope i’m not sure about the second part