SOLUTION: 3square root 12 + 4square root 3 = 8square root 5 - 2 square root 45 = Could you please explain how these are fully done. I am having a hard time understanding

Question 128326: 3square root 12 + 4square root 3 =

8square root 5 - 2 square root 45 =
Could you please explain how these are fully done. I am having a hard time understanding how to do them. I thank you in advance and look forward to hearing from you.The question is not in any text and is only on a printed sheet.
Matthew
Found 2 solutions by checkley71, josmiceli:
Answer by checkley71(8403) (Show Source): You can put this solution on YOUR website!
3SQRT12+4SQRT3=3SQRT(4*3)+4SQRT4SQRT3=3*2SQRT3+4SQRT3=(6+4)SQRT3=10SQRT3.
8SQRT5-2SQRT45=8SQRT5-8SQRT(9*5)=8SQRT5-(8*3)SQRT5=(8-24)SQRT5=-16SQRT5.
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
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Notice that
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Notice that is a common factor
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answer
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Notice is a common factor
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answer

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