Homework Help: Algebra

Posted by Shealyn on Sunday, February 1, 2009 at 6:18pm.

I am a bit confused about conjugates in algebra. I am supposed to multiply 8/(the square root of two + 4) by the square root of 2 -4. My math book then goes on to simplify this to (8 times the square root of two minus 32) divided by (2-4 times the square root of two plus 4 times the square root of 2 minus 16). I do not see how the bottom part came to be. Could someone offer an explanation, please?

Algebra - sheila, Sunday, February 1, 2009 at 7:31pm
if a=4
b=20
c=50 us tge answer 5,340.00

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