Multiply. Simplify your answer. Use radicals as needed.
(2+√5)(2-√5)
Multiply. (2+√5)(2-√5)…?
2010-02-12 1:39 pm
回答 (7)
2010-02-12 1:43 pm
✔ 最佳答案
(a+b)(a-b) = a^2 - b^2(2+√5)(2-√5) = 2^2 - √5^2 = 4 - 5 = -1
2010-02-12 3:17 pm
(2 + √5)(2 - √5)
= 2(2) - 2(√5) + √5(2) - √5(√5)
= 4 - 2√5 + 2√5 - 5
= 4 - 5
= -1
= 2(2) - 2(√5) + √5(2) - √5(√5)
= 4 - 2√5 + 2√5 - 5
= 4 - 5
= -1
2010-02-12 1:51 pm
(2+√5)(2-√5)
=4- √(25)
=4-5
=-1 answer//
=4- √(25)
=4-5
=-1 answer//
2010-02-12 1:46 pm
(2+√5)(2-√5) = 4 - 5 = - 1
2010-02-12 1:44 pm
Ans. (2+√5)(2-√5)
=4-√5+2√5-5
=4-5
= -1
=4-√5+2√5-5
=4-5
= -1
收錄日期: 2021-05-01 13:02:54
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