Which shows how to find the value of this expression when x=-2 and y = 5?
(3x3y=272
31-216
(-2)4
21954

Option 1 is correct

Step-by-step explanation:

Given expression is:

Putting the values

Hence option one is correct ..

Let's start with the basic idea that we can multiply a number by 1 without changing its value, and that we can express 1 as a fraction with the same numerator and denominator:

In cases like these (i.e. where the denominator is a square root) we can multiply both numerator and denominator of the fraction by the square root itself:

But the square of a square root is the agument of the root, i.e. , so we have

And we rationalized the denominator, as asked.