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Junior | Next Rank: 30 Posts
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by kwhite » Fri Feb 24, 2012 11:51 pm
I posted this in the DS forum but i wasn't sure if anyone would see it there so ill leave this here as well if thats ok

What is the value of a - b?

1) a^2 - b^2 = 9

2) a^2 - 2ab + b^2 = 1

[Moderator Edit: Moved the post to a relevant forum - neelgandham]

I am really stumped and the book explanation isn't helping me at all. Going off of #1 a^2 - b^2 = 9 --> (a-b)(a+b)=9 Therefore:

can't we take (a-b) = 9?? or is my factoring just really off tonight??

thank you for your help.

OA = E
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by sanju09 » Sat Feb 25, 2012 4:45 am
kwhite wrote:I posted this in the DS forum but i wasn't sure if anyone would see it there so ill leave this here as well if thats ok

What is the value of a - b?

1) a^2 - b^2 = 9

2) a^2 - 2ab + b^2 = 1



I am really stumped and the book explanation isn't helping me at all. Going off of #1 a^2 - b^2 = 9 --> (a-b)(a+b)=9 Therefore:

can't we take (a-b) = 9?? or is my factoring just really off tonight??

thank you for your help.

OA = E
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