Thread: Simplify expression - steps?

THe link below shows a picture of a problem i need help in how can i solve it? what are the step by step? you can also help me solve it so i can find ot how to solve my other problems. Thanks ;]



http://img369.imageshack.us/my.php?image=dsdsdsyw2.png

do you know the rule for manipulating radicals


so use this and taking out the common factor of

then use the fact that

i still don't know how should i do the problem.... is there a step by step showing of that problem. im sorry. ;[

We start with:

We can simplify the second radical by pulling out a factor of 9:

Then the square root of 9 becomes 3:

We combine the like terms:

We can also take out a factor of x^2:

The square root of x^2 is the absolute value of x:

And the problem is done, because cannot be further broken down.