80 points if you answer these two questions

1. Demonstrate that the properties of radicals do not apply to the square root of two terms. In other words, show √a+b ≠ √a+√b by evaluating both sides of the inequality √9+16 ≠ √9+√16
2. Multiply the factions below. Explain why you do not need to rationalize the denominator of the product. (√6/5)(8/√20)