a. Factorize 144x^2+120xy+25y^2
b. use the result in (a) to factorize (72/5)a^2 + 12ab + (5/2)b^2.
Factorize
2008-06-14 2:37 am
回答 (1)
2008-06-14 3:01 am
✔ 最佳答案
a144x^2+120xy+25y^2
= (12x + 5y)^2
b
(72/5)a^2 + 12ab + (5/2)b^2
= (144a^2)/10 + (120ab/10) + (25b^2)/10
= (12a+b)^2 / 10
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*
144/10 = 72/5
120/10 = 12
25/10 = 5/2
收錄日期: 2021-04-13 15:41:23
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