乘法公式(10001-16)^2-(10006-11)^2

2013-07-10 9:00 pm
(10001-16)^2-(10006-11)^2

回答 (3)

2013-07-10 9:47 pm
✔ 最佳答案
(10001-16)^2-(10006-11)^2=9985^2-9995^2=(9985-9995)(9985+9995)=-10*19980=-199800
2013-07-10 10:21 pm
(A+B)(A-B) = A^2-B^2

所以得到:
(9985-9995)(9985+9995)
= -10*19980
= -199800
2013-07-10 9:22 pm
a^2-b^2=(a+b)(a-b)

(10001-16)^2-(10006-11)^2
=(10001-16+10006-11)[10001-16-(10006-11)]
=(19980)(-10)=-199800


收錄日期: 2021-04-30 17:38:46
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20130710000010KK02166

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