Dado un rectángulo ∎ABCD de lados de longitud x y y con área 15 cm2, sea AC una de sus diagonales de longitud d, esprese la longitud d en función de la longitud x.

5.5

step-by-step explanation:

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