SOLUTION: perform and simplify completely. {{{ (sqrt(6)+ 3sqrt(3))}}}^2 would the correct answer be 6+ 3sqrt(9)

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Question 621717: perform and simplify completely.
^2

would the correct answer be 6+ 3sqrt(9)
Found 3 solutions by ewatrrr, tutor_paul, josmiceli:
Answer by ewatrrr(24785)   (Show Source):
You can put this solution on YOUR website!

Hi,
^2

F First terms 6
O Outside terms
I Inside terms
L Last terms 27
^2 = 33 + 18sqrt(2)

Answer by tutor_paul(519)   (Show Source):
You can put this solution on YOUR website!

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Follow the rules for squaring a binomial:
1. Square first term
2. Multiply the 2 terms and double the result add to above
3. Square 2nd term add the result to above
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When you follow these rules, you get:

Simplify:

Simplify the radical:

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Good Luck,
tutor_paul@yahoo.com

Answer by josmiceli(19441)   (Show Source):
You can put this solution on YOUR website!

answer
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I can check this using a calculator
for the square roots

and

and

The answers look close enough