SOLUTION: I need help I do not understand how to solve them ..Can someone show me step by step please....chapter 9 sect.9.4 # 28 Perform the indicated multiplication. Then simplify eac

Question 73878: I need help I do not understand how to solve them ..Can someone show me step by step please....chapter 9 sect.9.4 # 28

Perform the indicated multiplication. Then simplify each radical expression.
Problem #28
radical (7) (2radical(3) + 3 radical (7) )
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
radical (7) (2radical(3) + 3 radical (7) )
The rule for multiply radicals is (sqrt(a))(sqrt(b))=sqrt(ab)
Your problem:
= [2(sqrt(7)*sqrt(3)] +[(sqrt(7)*(3sqrt7)]
=[2sqrt(21) + 3*7]
=2sqrt21 + 21
===============
Cheers,
Stan H.
RELATED QUESTIONS
I do not understand how to solve f(x)=ca^x. can someone show me step by step examples of... (answered by richard1234)

We are doing 1 step equations at our adult education class and I do not understand these... (answered by ankor@dixie-net.com)

15m-9-6m=9 I need someone to show me step by step how to work out this... (answered by checkley71,mathdumb)

can someone please show me how to solve this step by step? I need to simplify this.... (answered by ankor@dixie-net.com)

I need to understand how to do this problem by factoring completely. I believe my first... (answered by jim_thompson5910)

I have a problem about factoring two variables I do not understand it. I need it worked... (answered by Alan3354)

Hi, I need help. I dont understand how to do two-step equations. Can you please explain... (answered by rfer)

Please I really need help with this equation 2u-9=7u+15-u-20 Could you show me... (answered by richard1234)

I do not know how to solve these kinds of problems. Someone please explain this to me... (answered by Alan3354)