Three square root two divided by square root six plus square root two

√3 / √6 + √2

to make the denominator whole number, you need to multiply with the opposite

so, it became √3 / √6 + √2 × √6 - 2 / √6 - 2

you multiply √3 and √6 - 2.

and multiply √6 + √2 and √6 - √2. if you multiply √6 and √6, it is 6. the same goes for √2.

The next step is √18 - √6 / 6 - 2.

√18 is the same as 3√2.

The answer is 3√2 - √6 / 4.

B. because the 7 represents "seven times", x represents "a number", 12 represents "plus twelve", and -4 represents "minus four"