SOLUTION: I really need help with this question: 4(sqrt)10(sqrt)40) ive tried for hrs but i can not get it...please help! THANKS!

Algebra ->  Square-cubic-other-roots -> SOLUTION: I really need help with this question: 4(sqrt)10(sqrt)40) ive tried for hrs but i can not get it...please help! THANKS!      Log On


   

Question 312538: I really need help with this question:
4(sqrt)10(sqrt)40)
ive tried for hrs but i can not get it...please help!
THANKS!
Found 2 solutions by Fombitz, solver91311:
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
4%2Asqrt%2810%29%2Asqrt%2840%29=4%2Asqrt%28400%29
4%2Asqrt%2810%29%2Asqrt%2840%29=4%2A%280+%2B-+20%29<--- Square root can be +20 or -20.
4%2Asqrt%2810%29%2Asqrt%2840%29=0+%2B-+80

Answer by solver91311(24713) About Me  (Show Source):
You can put this solution on YOUR website!


I'm guessing that you mean:



and that you want to simplify the expression.

Note that, in general,



Your expression becomes:




John