1、6√15/(3√2+2√3)
来源:学生作业帮 编辑:大师作文网作业帮 分类:数学作业 时间:2024/11/10 08:31:21
1、6√15/(3√2+2√3)
2、(5√3-3√6)/(3√3+2√6)
3、(1/√3+√2)+(1/√2-1)-2/√3+1
4、(1/a√9a³-√b³/3b²)-(2a√1/4a -b√25/b³)
5、已知x=1/√5-2,求x²-4x-1的值
2、(5√3-3√6)/(3√3+2√6)
3、(1/√3+√2)+(1/√2-1)-2/√3+1
4、(1/a√9a³-√b³/3b²)-(2a√1/4a -b√25/b³)
5、已知x=1/√5-2,求x²-4x-1的值
1.6√15/(3√2+2√3)
= 6√15(3√2-2√3)/(3√2+2√3)(3√2-2√3)
=(18√30-36√5)/(18-12)
=(18√30-36√5)/6
=3√30-6√5
2.(5√3-3√6)/(3√3+2√6)
= (5√3-3√6)(3√3-2√6)/(3√3+2√6)(3√3-2√6)
=(45-30√2-27√2+36)/(27-24)
=(81-57√2)/3
=27-19√2
3.(1/√3+√2)+(1/√2-1)-2/√3+1
= √3/3+√2+√2/2-1-2√3/3+1
=3√2/2-√3/3
4.(1/(a√(9a³))-√b³/(3b²))-(2a√(1/4a) -b√(25/b³)) (这道题不知道那些在分子上哪些在分母上)
=√a/3a³-√b/3b-√a-5√b/b
=√a(1-1/3a³)-√b(1/3b-15/3b)
=√a(1-1/3a³)-16√b/3b
5.x²-4x-1=(x+2)²-8x-5
=(1/√5)²-8(1/√5-2)-5
=1/5-8√5/5+16-5
=56/5-8√5/5
= 6√15(3√2-2√3)/(3√2+2√3)(3√2-2√3)
=(18√30-36√5)/(18-12)
=(18√30-36√5)/6
=3√30-6√5
2.(5√3-3√6)/(3√3+2√6)
= (5√3-3√6)(3√3-2√6)/(3√3+2√6)(3√3-2√6)
=(45-30√2-27√2+36)/(27-24)
=(81-57√2)/3
=27-19√2
3.(1/√3+√2)+(1/√2-1)-2/√3+1
= √3/3+√2+√2/2-1-2√3/3+1
=3√2/2-√3/3
4.(1/(a√(9a³))-√b³/(3b²))-(2a√(1/4a) -b√(25/b³)) (这道题不知道那些在分子上哪些在分母上)
=√a/3a³-√b/3b-√a-5√b/b
=√a(1-1/3a³)-√b(1/3b-15/3b)
=√a(1-1/3a³)-16√b/3b
5.x²-4x-1=(x+2)²-8x-5
=(1/√5)²-8(1/√5-2)-5
=1/5-8√5/5+16-5
=56/5-8√5/5
1、(√3-√2+√6)*(√3+√2-√6)
|√6|-√2+√(√2-1)² -√(√6-3)²
化简(3+√3+√5+√15)分之1+2√3+√5
|√2-√3|+|√2-1|-√(2√3-6)²要过程
计算:⑴√2+√8-2√18,⑵√12+√1/27-√1/3,⑶√3(2√3-√6),⑷(2√3+3√2)(2√3-3√
1、6√15/(3√2+2√3)
1 √2 √3 √6 1 √2 √3 √6 1 √2 √3 √6 1 √2 √3
(√24-√0.5-2√2/3)-(√1/8 -√6 )
(√3,1)、(√5,2)、(√7,3)、(√9,4)、(√11,5)、(√13,6)、(√15,7)…………
计算:√4-√3/√12+√3-√2/√6+√2-√1/√2=?
化简:√2+2√3+√5 / √6+3+√10+√15
化简(√6-1/3√3/2-1/2√24)*(-2√6)