(2x + 1/2)2 - (1 - 2x)2 = 2
<=> 4x2 +2x + 1/4 - 1 + 4x - 4x2 - 2 = 0
<=> 6x -11/4 = 0
<=> 6x = 11/4
<=> x =11/24
Đúng 0
Bình luận (0)
Các câu hỏi tương tự
a,tim x biet |x-2|+|3-2x|=2x+1
b,tim x,y thuoc Z biet xy+2x-y=5
c, tinh A=(1-1/15)(1-1/21)(1-1/28).....(1-1/210)
Tim x,y,z biet:2(x-1)-3(2x+2)-4(2x+3)=16
tim x biet 2x+1/x-2=2x-3/x+6
tim x biet
|2x+1|+|2x+2|+|2x+3|+...+|2x+1007|=2015x
tim x biet (2x+1)^2+(2y+2)^2+(2z+1)^2=0
|(x+1/2).|2x-3/4||=2x-3/4 tim x biet
Tim xthuoc Z biet:
1,|2x-5|-|2x+9|=0
2,|x+1|-|x+2|-|3-x|=7
3,|2x+3|+|3x+2|-|4-x|=10
tim x biet (2x-3)^2-4(x+1)^2=5
Tim x,y,z biet:2(x-1)-3(2x+2)-4(2x+3)=16
giai day du