5 over 7√− 2 is rationalized by multiplying the numerator and denominator by what?
A. 7√ + 2
B. 7√
C. 5
D. 7√ − 2
To rationalize a fraction with a radical in the denominator, we need to multiply both the numerator and denominator by a suitable expression in order to eliminate the radical.
In this case, the denominator is 7√ - 2. To get rid of the radical, we can multiply the numerator and denominator by the conjugate of the denominator, which is 7√ + 2.
Therefore, the correct answer is A. 7√ + 2.