The answer is 2√2. Prove that the square of the expression is 8. To simplify a fraction with the denominator , multiply the numerator and the denominator by .
First, no, that is not the answer. Are you sure you copied it correctly?
It would be possible, since you are given x, to find both x- 1 and and do the division directly. However, is a little tedious to find so I would look at . so and . Then . Do that division by multiplying both numerator and denominator by