Solve (2-√2)(2+√2)?
回答 (3)
2016-05-05 4:40 pm
Identity :
(a - b)(a + b) = a² - b²
Then, (2 - √2)(2 + √2)
= (2)² - (√2)²
= 4 - 2
= 2
(a - b)(a + b) = a² - b²
Then, (2 - √2)(2 + √2)
= (2)² - (√2)²
= 4 - 2
= 2
2016-05-05 4:37 pm
(2-√2)(2+√2) = (2)(2) + (2)(√2) - (√2)(2) - (√2)(√2)
= 4 + 0 - 2
= 2
= 4 + 0 - 2
= 2
2016-05-05 4:46 pm
Anyone out there to help me to solve this?
收錄日期: 2021-04-18 14:47:59
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20160505083435AAIISim