中二簡單factorization~~~

2009-10-05 2:35 am

a.factorize 2a^2b^2-4ab

b.factorize 3ab-6

c.by using the results of (a) and (b),factorize 2a^2b^2-ab-6

d.factorize -4n^2+25p^2

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回答 (1)

2009-10-05 3:07 am

✔ 最佳答案

a)2a2b2-4ab
=2ab(ab-2)

b)3ab-6
=3(ab-2)

c) 2a2b2-ab-6
=2a2b2-4ab+3ab-6
=2ab(ab-2)+3(ab-2)
=(ab-2)(2ab+3)

d)-4n2+25p2
=25p2-4n2
=(5p-2n)(5p+2n)

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