answer these problems on multiplying radicals

Question

1. 6√8 • 3√3 2. 5√3 • 3√3 3. 9√2 • 3√5 4. 5√7 • 2√3 5. 4√6 • 2√6 6. 2√x • 3√x 7. 5√y • √y 8. -3√3z^12 • 6√12z^3 9. (2√3-√2)(3√3+√2) 10. (√5-√3)(2√5+4√3)

Answer 1

I'll do three of them, but you need to do your own homework.

6sqrt(8) * 3sqrt(3)  = (6*3)sqrt(8*3) = 18sqrt(24) = 18sqrt(4*6) = 36sqrt(6)

5sqrt(3) * 3sqrt(3) = (5*3)sqrt(3*3) = 15sqrt(9) = +45 or -45

9sqrt(2) * 3sqrt(5) = (9*3)sqrt(2*5) = 27sqrt(10)