x = a''+b'' and y = (a+b)
.......(a- b)................ a''- b''.....................( '' = 2)
1)............fine (x+y)
2)............fine (x-y)
3)............express (x+y) in terms of a and b ; and
.........................(x-y)
4) express (x+y) (x-y) in terms of a and b
x = a''+b'' and y = (a+b)簡單數學
2008-06-18 6:14 pm
回答 (5)
2008-06-19 5:50 pm
✔ 最佳答案
1)x+y=(a^2+b^2)+(a+b)=a^2+a+b^2+b//
2)
x-y=a^2+b^2-a-b=a^2-a+b^2-b//
(x+y)(x-y)
=x^2-y^2
=a^4+2a^2 b^2+b^4-a^2-2ab-b^2//
2008-06-23 6:01 am
A+B=C B+A=C C-A+B D-C=A
2008-06-22 22:07:30 補充：
A+B=C B+A=C C-A=BD-C=A
2008-06-22 22:08:58 補充：
jeremym2001712 good
2008-06-22 22:07:30 補充：
A+B=C B+A=C C-A=BD-C=A
2008-06-22 22:08:58 補充：
jeremym2001712 good
參考: ME, ME
2008-06-22 6:41 pm
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2008-06-19 12:03 am
yes =a^2 (a的2次方)thankyou!
2008-06-18 9:01 pm
你所講的 a" 其實係唔係 a^2 (a的2次方)?
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