3√18+五分之一√50-四分之一√二分之一=√2(1+√2)-1=√48÷√3-√二分之一×√12+√24=(5+√10)(5√2-2√5)=
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/20 12:32:47
![3√18+五分之一√50-四分之一√二分之一=√2(1+√2)-1=√48÷√3-√二分之一×√12+√24=(5+√10)(5√2-2√5)=](/uploads/image/z/13311684-36-4.jpg?t=3%E2%88%9A18%2B%E4%BA%94%E5%88%86%E4%B9%8B%E4%B8%80%E2%88%9A50-%E5%9B%9B%E5%88%86%E4%B9%8B%E4%B8%80%E2%88%9A%E4%BA%8C%E5%88%86%E4%B9%8B%E4%B8%80%3D%E2%88%9A2%281%2B%E2%88%9A2%29-1%3D%E2%88%9A48%C3%B7%E2%88%9A3-%E2%88%9A%E4%BA%8C%E5%88%86%E4%B9%8B%E4%B8%80%C3%97%E2%88%9A12%2B%E2%88%9A24%3D%285%2B%E2%88%9A10%29%285%E2%88%9A2-2%E2%88%9A5%29%3D)
3√18+五分之一√50-四分之一√二分之一=√2(1+√2)-1=√48÷√3-√二分之一×√12+√24=(5+√10)(5√2-2√5)=
3√18+五分之一√50-四分之一√二分之一=
√2(1+√2)-1=
√48÷√3-√二分之一×√12+√24=
(5+√10)(5√2-2√5)=
3√18+五分之一√50-四分之一√二分之一=√2(1+√2)-1=√48÷√3-√二分之一×√12+√24=(5+√10)(5√2-2√5)=
3√18+(√50)/5-√(1/2)/4= 3x3√2 + 5√2/5 - (1/√2)/4
= 9√2 + √2 - 1/(4√2) =10√2 - √2/ (4x2)
= ( 10-1/8) √2 = 79 √ 2 / 8
√2(1+√2)-1=√2+2-1 =√2+1
√48÷√3-√(1/2)×√12+√24= √(48/3) - √(12/2) +√24
= 4- √6 + 2√6
=4 +√6
(5+√10)(5√2-2√5)= 25√2 -10√5 + 5√20 - 2√50
= 25√2- 10√5+5x2√5- 2x5√2
= 25√2-10√5 + 10√5 -10√2
= 15√2
①3√18+1/5×√50-1/4×√1/2=9√2﹢√2﹣1/8×√2=9·875√2
②√2﹙1﹢√2﹚-1=√2﹢2-1=√2+1
③√48÷√3-√1/2×√12+√24=√﹙48÷3﹚-√﹙1/2×12﹚﹢2√6
=√12-√6﹢2√6=2√3+√6
④﹙5+√10﹚﹙5√2-2√5﹚=[√5×﹙√...
全部展开
①3√18+1/5×√50-1/4×√1/2=9√2﹢√2﹣1/8×√2=9·875√2
②√2﹙1﹢√2﹚-1=√2﹢2-1=√2+1
③√48÷√3-√1/2×√12+√24=√﹙48÷3﹚-√﹙1/2×12﹚﹢2√6
=√12-√6﹢2√6=2√3+√6
④﹙5+√10﹚﹙5√2-2√5﹚=[√5×﹙√5+√2﹚]×[﹙√5-√2﹚×√10]
=√50×﹙5-2﹚=5√2×3=15√2
收起