37) √36a²+12ab+b², a=4/5, b=8 1/5

1. Recognize the expression under the radical as a perfect square: √((6a+b)²).
2. Simplify: |6a+b|.
3. Substitute a=4/5 and b=41/5: |6(4/5) + 41/5| = |24/5 + 41/5| = |65/5| = 13.