What is the value of x in the parallelogram below?

  11

Step-by-step explanation:

The diagonals of a parallelogram bisect each other. The value of x is the same as the length of the other half of the diagonal:

  x = 11

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

i think it would be 42cm