Question

Rút gọn biểu thức:

a,\(\left|a\right|\)+a

b,\(\left|a\right|\)-a

c,\(\left|a\right|\).a

d,\(\left|a\right|\):a

e, 3.(x-1)-2.\(\left|x+3\right|\)

g, 2.\(\left|x-3\right|\)-\(\left|4.x-1\right|\)

Answer 1

a,=0 hoac =2a

b,=0 hoac =-(2a)

c,=a² hoac =-(a²)

d,=1 hoac = -a/a

còn lại hông bít làm

Answer 2

e: TH1: x<-3

A=3x-3-2(-x-3)=3x-3+2x+6=5x+3

TH2: x>=-3

A=3x-3-2(x+3)=3x-3-2x-6=x-9

g: TH1: x<1/4

B=2(3-x)-(1-4x)

=6-2x-1+4x=2x+5

TH2: 1/4<=x<3

B=2(3-x)-4x+1=6-2x-4x+1=-6x+7

TH3: x>=3

B=2(x-3)-4x+1=2x-6-4x+1=-2x-5