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smclean23
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 Posted: Sat Aug 30, 2008 6:10 am Post subject: OG 11 #152...Understand everything but.....REALLY EASY! |
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In the explanation it says (4+a^2)+(4+b^2) simplifies to 8+a^2+b^2....
How does it? |
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II
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| Posted: Sat Aug 30, 2008 7:04 am Post subject: Re: OG 11 #152...Understand everything but.....REALLY EASY! |
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| smclean23 wrote: | In the explanation it says (4+a^2)+(4+b^2) simplifies to 8+a^2+b^2....
How does it? |
Just remove the brackets!
(4+a^2)+(4+b^2) = 4+(a^2)+4+(b^2) = 8+(a^2)+(b^2) |
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