SOLUTION: Would someone help me to understand this....Thanks
4 sqrt[50]+sqrt[32]-sqrt[18]
I got 4[5]+[4]-[6] not sure if that's right or not.
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Question 178166: Would someone help me to understand this....Thanks
4 sqrt[50]+sqrt[32]-sqrt[18]
I got 4[5]+[4]-[6] not sure if that's right or not.
Found 2 solutions by stanbon, solver91311:
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
4 sqrt[50]+sqrt[32]-sqrt[18]
= 4*sqrt(25*2)+sqrt(16*2)-sqrt(9*2)
= 4*5sqrt(2)+4sqrt(2)-3sqrt(2)
= (20+4-3)sqrt(2)
= 21sqrt(2)
==========================
Cheers,
Stan H.
Answer by solver91311(24713) (Show Source): You can put this solution on YOUR website!
not 50, so certainly )
Similarly, 
and 
, so the rest of your expression is incorrect as well.
You need to use the following rule:
(sqrt {y}))
Note that
So we can re-write your original expression as:
Since: 
, we can write:
Lastly, factor out the 
to obtain:
sqrt{2} = 21 sqrt {2})
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