If xy = 2 and xy2 = 8, what is the value of x?

If xy = 2 and xy² = 8, what is the value of x?

A 1/2

B 2

C 4

D 8

Solution

Correct Answer: Option A

Xy = 2

X= 2/y

Then,

Xy2 = 8

Or, (2/y)* y2 = 8

Or, 2*y = 8

Or, y = 4

Now,

Xy = 2

Or, x*4 = 2

Or, x = 2/4 = 1/2