Maths Question
回答 (3)
2012-09-06 12:33 am
(8x+3) (8x-3)
'.'(a+b)(a-b)=a^2-ab+ba-b^2=a^2-b^2
.'.(8x+3) (8x-3)=64x^2-9
'.'(a+b)(a-b)=a^2-ab+ba-b^2=a^2-b^2
.'.(8x+3) (8x-3)=64x^2-9
2012-09-05 11:53 pm
64x^2-9
(a+b)(a-b)
=a^2-b^2
(a+b)(a-b)
=a^2-b^2
收錄日期: 2021-04-23 20:22:27
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