化简:3根号2x-5根号8x 7根号18x,并将自己喜欢的x值代入求值.

(3/2)√(8/27)=(3/2)(2/3)√(2/3)=(√6)/3√(3.6x10^3)=√(3600)=60√2/√6=(√12)/6=(√3)/3√(3/2)√(2/5)=√(3/2)(2/

题是这样的吧：[(√x-√y)^3+2x√x+y√y]/(x√x+y√y)+[3√(xy)-3y]/(x-y)原式=[(x√x-3x√y+3y√x-y√y)+2x√x+y√y]/(x√x+y√y)+[

[5^(1/2)+3^(1/2)-2^(1/2)]/[8+2(15)^(1/2)+(10)^(1/2)-6^(1/2)]=[5^(1/2)+3^(1/2)-2^(1/2)]/{3+2(15)^(1/2

（根号5+根号3+根号2）X（根号5减2倍根号3+根号2）=[(√5+√2)+√3][(√5+√2)-2√3)]=(√5+√2)^2-√3(√5+√2)-6=1+2√10-√15-√6

（2-根号10）2次方+根号40根号2分之根号8x根号10根号45分之根号20+根号5-根号3分之1x根号6=14-4根号10+1/15+(根号30+3根号2）/2=211/15-4根号10+(根号3

原式=2√3+√6-√36+30*√6/6=2√3+√6-6＋5√6=2√3+6√6-6

若|3-x|=根号5则x=|3-x|=√53-X=±√5X1=3+√5,X2=3-√53根号2/5+根号5/2-根号10=3√2/5+√5/2-√10=3/5√10+1/2√10-√10=21/10√

根号24=2√6根号5分之3=√15/5根号3.2=4√5/53根号12-根号48=2√3根号9分之2+根号50-根号72=√2/3+5√2-6√2=-2√2/3根号18-根号32-根号8分之1根=3

√2≈1.414√3≈1.732√4≈2√5≈2.236√6≈2.449√7≈2.646√8≈2.828√9≈3√10≈3.162√11≈3.317√12≈3.164√13≈3.606√14≈3.74

[8+2(15)^(1/2)-(10)^(1/2)-6^(1/2)]/[5^(1/2)+3^(1/2)-2^(1/2)]={3+2(15)^(1/2)+5-2^(1/2)[5^(1/2)+3^(1/2

(1)(√8)+[√(1/8)]=(√8)+(√8)/8=(9√8)/8(2)√0.2-√5=[√(1/5)]-(√5)=(√5)/5-(√5)=-4√5/5(3)3√2x-5√8x=3√2x-10√

根号8+根号18=2√2+3√2=5√22根号12+根号48=4√3+4√3=8√33根号20-根号45-根号5分之1=4√5-3√5-√5/5=4√5/5根号9分之2+根号50-根号32=√2/3+

7^4-3x7^2-8x7^3=7^2x(7^2-3-8x7)=7^2x(49-3-56)=49x(-10)=-490(x+y)^2-2(x^2-y^2)+(x-y)^2=(x+y)^2-2(x+y)

1*根号2*根号3*根号5*根号6*根号7*根号8=根号（1*2*3*4*5*6*7*8）=根号40320=24倍根号70

1：根号2分之根号32-根号8=√32/√2-√8=4√2/√2-2√2=4-2√22：（根号2+根号3）X（根号2-根号3）+2根号12=2-3+4√3=4√3-1再问：第一个是根号32-根号8/根

不知道楼主什么意思,求近似值吗?=1+1.414+1.732+2+2.236+2.449+2.646+2.828+3+3.162=22.467

：2√5x（4√20-3√45+2√5）=2√5x(8√5-9√5+2√5）=10

小弟弟小妹妹,要这样算=(根号1+2+3+4+5+6+7+8+9+10）÷2

(√5+√3-√2)*(√5-√3+√2)=[√5+(√3-√2)]*[√5-(√3-√2)]=(√5)^2-(√3-√2)^2=5-(3+2-2√6)=2√6