Answer:
C. x =3
Step-by-step explanation:
Extraneous solution is that root of a transformed equation that doesn't satisfy the equation in it's original form because it was excluded from the domain of the original equation.
Let's solve the equation first

Hence, we can conclude that x=3 is an extraneous solution of the equation ..
And you know right this girl has how many years of the first type of quantity of correspond to one unit of the second type of quantity
The answer would be 28 and 1/4.
So 'the square root of 9/16' is '3/4'