求救！中四math因式分解

Ho Ki

2008-09-11 1:27 am

math因式分解:
4x^2-9=0

更新1:

即係答案要x=(?)或x=(?)

回答 (2)

[匿名]

2008-09-11 2:52 am

✔ 最佳答案

4x^2-9=0
(2x+3)(2x-3)=0(factorization)
x=3/2, -3/2

參考: myself

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[匿名]

2008-09-11 1:42 am

4x^2-9=0

4x^2=9

x^2=9/4

x=9/4既開方

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