Tim x biet |x-3| =2x+4
|(x+1/2).|2x-3/4||=2x-3/4 tim x biet
tim x biet: ||x-1/2|.|2x-3/4||=2x-3/4
tim x biet: ||x-1/2|.|2x-3/4||=2x-3/4
\(\left|x-\dfrac{1}{2}\right|\left|2x-\dfrac{3}{4}\right|=2x-\dfrac{3}{4}\)
\(\left\{{}\begin{matrix}\left|x-\dfrac{1}{2}\right|\ge0\\\left|2x-\dfrac{3}{4}\right|\ge0\end{matrix}\right.\)
\(\Rightarrow2x-\dfrac{3}{4}\ge0\)
\(\Rightarrow\left|2x-\dfrac{3}{4}\right|=2x-\dfrac{3}{4}\)
\(\Rightarrow\left|x-\dfrac{1}{2}\right|=1\)
\(\Rightarrow\left[{}\begin{matrix}x-\dfrac{1}{2}=1\Rightarrow x=\dfrac{3}{2}\\x-\dfrac{1}{2}=-1\Rightarrow x=-\dfrac{1}{2}\end{matrix}\right.\)
\(2x-\dfrac{3}{4}\ge0\Rightarrow2x\ge\dfrac{3}{4}\Rightarrow x\ge\dfrac{3}{2}\)
Vậy xảy ra khi:
\(x=\dfrac{3}{2}\)
|(x+1/2).|2x-3/4||=2x-3/4 tim x biet
Tim so nguyen x biet : -x/2+2x/3+x+1/4+2x+1/6=3/8
12x/6 + 4x/6 - 3x/6 = 3/8 - 1/4 - 1/6
13x/6 = (9 - 6 - 4)/24 = -1/24
--> x = -1/52
Tim x, biet:
(2x-1)(3-x)+(x+4)(x-3)=-3
Bài làm
( 2x - 1 )( 3 - x ) + ( x + 4 )( x - 3 ) = -3
( x - 3 )( 2x - 1 + x + 4 ) + 3 = 0
( x - 3 )( 3x + 3 ) = 0
=> x - 3 = 0 hoặc 3x - 3 = 0
=> x = 3 hoặc 3x = 3
=> x = 3 hoặc x = 3 : 3
=> x = 3 hoặc x = 1
Vậy x = 3; x = 1
# Học tốt #
\(\left(2x-1\right)\left(3-x\right)+\left(x+4\right)\left(x-3\right)=-3\)
\(\Leftrightarrow\left(2x-1\right)\left(3-x\right)-\left(x+4\right)\left(3-x\right)=-3\)
\(\Leftrightarrow\left(3-x\right)\left(2x-1-x-4\right)=-3\)
\(\Leftrightarrow\left(3-x\right)\left(x-5\right)=-3\)
\(\Leftrightarrow x^2-8x+15=-3\)
\(\Leftrightarrow x^2-8x+18=0\)
Ta có: \(\Delta=8^2-4.18=-8< 0\)
Vậy pt vô nghiệm
✫•°*”˜˜”*°•.¸✫ Ṱђầภ Ḉђết ✫¸.•°*”˜˜”*°•✫Bạn sai tui ko ns thì câm lại đi
(2x-1)(3-x)+(x+4)(x-3)=-3
Đổi dấu (2x-1)(3-x)-(x+4)(3-x)=-3 để có cùng nhân tử chung
Tim x,y,z biet:2(x-1)-3(2x+2)-4(2x+3)=16
2(x-1)-3(2x+2)-4(2x+3)=16
2x-2-6x+6-8x+12=16
(2x-6x-8x)-(2+6+12)=16
(-12).x-20=16
(-12).x=16+20=36
x=36:(-12)=-3
2(x-1)-3(2x+2)-4(2x+3)=16
2x-2-6x-6-8x-12=16
2x-6x-8x=16+2+6+12
-12x=36
x=-3
Bạn ấy trả lời đúng rồi
Mike bạn ấy nhé
Chúc học tốt
tim x biet |2x+3|-2|4-x|=5
tim x biet |2x+3|-2|4-x|=5