## anonymous 5 years ago What is the square root of 90 times the square root of 40?

1. anonymous

√(90)(√(40))=60

2. anonymous

How would you factor that problem out?

3. anonymous

4. anonymous

$\sqrt{90}*\sqrt{40} = \sqrt{90*40} = \sqrt{3600} = \sqrt{36 * 100}$$= \sqrt{36} * \sqrt{100} = 6 * 10$

5. anonymous

$\sqrt{90}\times \sqrt{40}$

6. anonymous

polpak plz ....if u can help me.......c ma quesn

7. anonymous

How would you do this problem: square root of 3x times the square root of 8x to third power?

8. anonymous

The same way. Multiply the stuff under the radical, then pull out squares.

9. anonymous

Start by multiplying the things under the radical, what do you get? $\sqrt{3x}*\sqrt{8x^3} = \sqrt{???}$

10. anonymous

24xto the 4th

11. anonymous

Right. So $$x^4 = (?)^2$$