Nguyễn Đình Huy's Profile

3*x+20=100/5

3*x+20=20

3*x=0

x=0

a,y*y*2=8

y*y=4

y=2

hoac y=-2

b,y*y/2=8

y*y=16

y=4

hoac y=-4

(x-2)^1000=(x-2)^2000

(x-2)^1000((x-2)^1000-1)=0

+(x-2)^1000=0

x-2=0

x=2

+(x-2)^1000-1=0

(x-2)^1000=1

x-2=1   suy ra x=3

x-2=-1  suy ra x=1

vay x=0,1,3

(5x+5)(2x-1)>0

+5X+5>0   suy ra x>-1

va 2x-1>0   suy ra x>1/2

suy ra x>1/2

+5x+5<0   suy ra x<-1 

va 2x-1<0  suy ra x<1/2

suy ra x<-1

vay x<-1 va x>1/2

boi so nho nhat cua 6 va 8 la 24

4y+10=0

4y=-10

y=-5/2

5x^2+4y^2-4xy-10x=0

5x^2+25+10x-10x=0

5x^2+25=0

5x^2=-25(loai)

vay ko co x,y thoa man