Respuesta :

A radical equation is an equation in which a variable is under a radical

So D. 

Answer:

Option D. 7√x = 14

Step-by-step explanation:

By definition radical equation is an equation in which a variable is under radical.

Now we see the options given only in option D. x is variable under radical.

Therefore, 7√x = 14 is the radical equation.

Hence Option D. is the correct option.