and i don't know what to do when adding sq. roots...
can someone please help me?
更新1:
anyone? HELP! i am really confused!
i need help with a sq. roots problem?
2006-11-08 2:03 am
ok so i have to find the average of (sq. root of)5 and (the square root of) 45
and i don't know what to do when adding sq. roots...
can someone please help me?
and i don't know what to do when adding sq. roots...
can someone please help me?
回答 (7)
2006-11-08 4:29 am
✔ 最佳答案
(sqrt)5+(surt)45=(sqrt)5+(sqrt) 9*5
=(sqrt)5+3(sqrt)5
=(sqrt5){1+3}
=4(sqrt5)
Therefore the average is 4(sqrt5)/2=2(sqrt5)
I am sure I was able to explain every step properly.If .still,you have any problem,please do not hesitate to write to me through Yahoo Answers and I shall be too happy to assist you.
2006-11-08 2:10 am
You cannot add two square roots unless they have the same number inside the square root such as if you had 2(square root of )3 and 3(square root of )3 that would become 5(square root of )3.
For this problem you would just write [(square root of)5 + (square root of)45]/2.
You cannot simplify the radical 45 further and have the same square root.
For this problem you would just write [(square root of)5 + (square root of)45]/2.
You cannot simplify the radical 45 further and have the same square root.
2006-11-08 2:09 am
I think it's (sq root)80 over 2
2006-11-08 2:09 am
u r on ur own my friend hey try braking them down first like try the prime factorization thinggy like 45 break it down into 5 see and so forth so 5 is ur new root, so is gonna be 5 multiply by the square root of 5
try it
if its addition then u have to find wat the square root of 5 is and then add it by the aquare root of 45 but its better to use the prime factorization which is going to give u 5 so the square root of 5 plus the square root of 5 and there is ur answer
good luck
try it
if its addition then u have to find wat the square root of 5 is and then add it by the aquare root of 45 but its better to use the prime factorization which is going to give u 5 so the square root of 5 plus the square root of 5 and there is ur answer
good luck
2006-11-08 2:08 am
find the square roots at
http://www.math.com/students/calculators/source/square-root.htm
then add them together and divide by 2....
or else, its just (* = sq root sign)
(*5 + *45)/2
(thats the most exact answer)
http://www.math.com/students/calculators/source/square-root.htm
then add them together and divide by 2....
or else, its just (* = sq root sign)
(*5 + *45)/2
(thats the most exact answer)
2006-11-08 2:07 am
8to the sq root of 15
2006-11-08 2:07 am
square root of 5 is root 5 and square root of 45 is 3root5 so...
3 root 5 plus root 5 is 4 root 5
3 root 5 plus root 5 is 4 root 5
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