Multiply:
(5√[3] + √[5])(√[3] – 2√[5])
更新1:
stuck on is*
Can someone help me with multiplying rational expressions?
回答 (3)
2009-01-17 9:31 am
✔ 最佳答案
(5√3 + √5)(√3 – 2√5)= 5√9-10√15+√15-2√25
=5*3-9√15-2*5
=15-9√15-10
=5-9√15 answer
參考: @(^_^)@
2009-01-17 5:45 pm
(5â3 + â5)(â3 - 2â5)
= 5â(3 x 3) + â(5 x 3) - (2 x 5)â(3 x 5) - 2â(5 x 5)
= 5(3) + â15 - 10â15 - 2(5)
= 15 - 10 + (1 - 10)â5
= 5 + (-9)â5
= 5 - 9â5
= 5â(3 x 3) + â(5 x 3) - (2 x 5)â(3 x 5) - 2â(5 x 5)
= 5(3) + â15 - 10â15 - 2(5)
= 15 - 10 + (1 - 10)â5
= 5 + (-9)â5
= 5 - 9â5
2009-01-17 5:26 pm
(5â3 + â5)(â3 - 2â5)
= (5â3)(â3 - 2â5) + (â5)(â3 - 2â5)
= (5â3)(â3) - 10(â3)(â5) + (â5)(â3) - (â5)(2â5)
= 5(3) - 10â15 + â15 - 2(5)
= 15 - 10â15 + â15 - 10
= 5 - 9â15
= (5â3)(â3 - 2â5) + (â5)(â3 - 2â5)
= (5â3)(â3) - 10(â3)(â5) + (â5)(â3) - (â5)(2â5)
= 5(3) - 10â15 + â15 - 2(5)
= 15 - 10â15 + â15 - 10
= 5 - 9â15
收錄日期: 2021-05-01 11:58:31
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