Answer:

Step-by-step explanation:
We want to simplify:

We rewrite the expression under the radical sign to obtain:

We split the expression under the radical sign to get:

Recall that:

This implies that:

Therefore 
Answer:
c
Step-by-step explanation:
Answer:
3u-15
Step-by-step explanation:
3(u-5)
Just multiply 3 by both of the numbers inside the parentheses and we get: 3u-15
Yes because 3² + 4² = 5²
to be sure
9 + 16 = 25
25 = 25
The numerator and denominator can be divided by 4 to get 12/25.
48 / 4 = 12
100 / 4 = 25