Evaluate each expression

Simple patterns, variables, the order of operations, simplification, evaluation, linear equations and graphs, etc.
Posts: 8
Joined: Fri Mar 22, 2013 3:46 pm

Evaluate each expression

Postby chiefboo » Fri Mar 22, 2013 7:00 pm

x x

So I understand that I convert the numbers into rational expressions and then multiple them...

x x

which simplifies to...

2 x x 3

which equals 36.

but how do I multiply these numbers without a calculator? lol... Maybe I don't even really need to know, but I'm expecting to take a placement test when I reenter university after severals years of not having to do this stuff and I'm concerned they may expect me to know how to multiply rational expressions without a calculator.

I don't know what this process or procedure is called and I can't find any clear examples in my text book.

User avatar
Posts: 1628
Joined: Mon Dec 08, 2008 4:22 pm

Postby stapel_eliz » Fri Mar 22, 2013 8:35 pm

To learn how to multiply radicals, try here and here. You'll see that you don't have to try to figure out the values of each of the cube roots; instead, you can multiply the insides and deal only with whole numbers. :wink:

Posts: 72
Joined: Sat Dec 29, 2012 2:42 am

Re: Evaluate each expression

Postby jg.allinsymbols » Sat Mar 23, 2013 3:01 am

Each of the bases can be factored, making simplification much easier. You may not need a calculator in you use the bases in their factored form.


Note that each of the exponentiated bases is to the two-thirds power!

Return to “Pre-Algebra”