(2x+3/5)2--9/25=0
tìm x biết:
(3x-1) [- 1/2x+5]=0
1/4+1/3:(2x-1)=-5
[2x+3/5]2 - 9/25=0
-5(x+1/5)-1/2(x-2/3)=3/2x - 5 /6
[x+1/2]x [2/3-2x]=0
17/2-|2x-3/4|=-7/4
2/3x-1/2x =5/12
(x+1/5)2+17/25=26/25
[x.44/7+3/7].11/5-3/7=-2
3[3x-1/2]+1/9=0
tìm x biết:
(3x-1) [- 1/2x+5]=0
1/4+1/3:(2x-1)=-5
[2x+3/5]2 - 9/25=0
-5(x+1/5)-1/2(x-2/3)=3/2x - 5 /6
[x+1/2]x [2/3-2x]=0
17/2-|2x-3/4|=-7/4
2/3x-1/2x =5/12
(x+1/5)2+17/25=26/25
[x.44/7+3/7].11/5-3/7=-2
3[3x-1/2]+1/9=0
Toán lớp 6Tìm x
Trả lời Câu hỏi tương tự
Chưa có ai trả lời câu hỏi này,bạn hãy là người đâu tiên giúp nguyenvanhoang giải bài toán này !
Tìm x
2x3-50x=0
2x(3x-5)-(5-3x)=0
9(3x-2)=x(2-3x)
(2x-1)2-25=0
25x2-2=0
X2-25=6x-9
(2x-1)2-(2x+5)(2x-5)=18
\(2x\left(x^2-25\right)=0\)
\(\Rightarrow\orbr{\begin{cases}2x=0\\x^2-25=0\end{cases}}\)
\(\Rightarrow\orbr{\begin{cases}x=0\\x=\pm5\end{cases}}\)
\(2x\left(3x-5\right)+\left(3x-5\right)=0\)
\(\left(2x+1\right)\left(3x-5\right)=0\)
\(\Rightarrow\orbr{\begin{cases}2x+1=0\\3x-5=0\end{cases}}\)
\(\Rightarrow\orbr{\begin{cases}x=-\frac{1}{2}\\x=\frac{5}{3}\end{cases}}\)
\(9\left(3x-2\right)-x\left(2-3x\right)=0\)
\(9\left(3x-2\right)+x\left(3x-2\right)=0\)
\(\left(9+x\right)\left(3x-2\right)=0\)
\(\Rightarrow\orbr{\begin{cases}9+x=0\\3x-2=0\end{cases}}\)
\(\Rightarrow\orbr{\begin{cases}x=-9\\x=\frac{2}{3}\end{cases}}\)
\(\left(2x-1\right)^2=25\)
\(\Rightarrow\orbr{\begin{cases}2x-1=5\\2x-1=-5\end{cases}}\)
\(\Rightarrow\orbr{\begin{cases}x=3\\x=-2\end{cases}}\)
\(2x^3-50x=0\)
\(\Leftrightarrow2x\left(x^2-25\right)=0\)
\(\Leftrightarrow x^2-25=0\)
\(\Leftrightarrow x^2=25\)
\(\Leftrightarrow x=\pm5\)
Tìm x biết 2(x+3)-x^2-3x=0
x^3+27+(x+3)(x-9)=0
4x^2-25-(2x-5)(2x+7)=0
8x^3-50x=0
(2x-1)^2-25=0
Tìm x, biết:
a. [3x -1].[-1/2x +5]=0.
b. 1/4 + 1/3 : [2x-1] = 5.
c. [2x + 3/5]mũ 2 - 9/25 = 0.
d. 3.[3x -1/2] mũ 3 + 1/9 +0
c)\(\left(2x+\frac{3}{5}\right)^2-\frac{9}{25}=0\)
\(\Rightarrow\left(2x+\frac{3}{5}\right)^2=\frac{9}{25}\)
\(\Rightarrow2x+\frac{3}{5}=\pm\frac{3}{5}\)
Với \(2x+\frac{3}{5}=\frac{3}{5}\)\(\Rightarrow2x=0\Rightarrow x=0\)
Với \(2x+\frac{3}{5}=-\frac{3}{5}\)\(\Rightarrow2x=-\frac{6}{5}\Rightarrow x=-\frac{3}{5}\)
a)x=10
b)x=61/114
c)x=0
d)sai cái gì đó
Đáp án là gì nhưng lời giải ???????
a. chia làm hai trường hợp
3x-1 = 0
-1/2x + 5 = 0
suy ra : 3x = 1
-1/2x = -5
x= 1/3
x= 10
k.(2x+3/5)2-9/25=0
l.3(3x-1/2)3+1/9=0
k. \(\left(2x+\dfrac{3}{5}\right)\cdot2-\dfrac{9}{25}=0\\ \Leftrightarrow\left(2x+\dfrac{3}{5}\right)\cdot2=\dfrac{9}{25}\\ \Leftrightarrow2x+\dfrac{3}{5}=\dfrac{9}{50}\\ \Leftrightarrow2x=\dfrac{-21}{50}\\ \Leftrightarrow x=\dfrac{-21}{100}\)
l. \(3\left(3x-\dfrac{1}{2}\right)\cdot3+\dfrac{1}{9}=0\\ \Leftrightarrow\left(3x-\dfrac{1}{2}\right)\cdot9=-\dfrac{1}{9}\\ \Leftrightarrow3x-\dfrac{1}{2}=-\dfrac{1}{81}\\ \Leftrightarrow3x=\dfrac{79}{162}\\ \Leftrightarrow x=\dfrac{79}{486}\)
1.Tìm x
(3x-1).(1/2x5)=0
1/4+1/3:(2x-1)=5
(2x+2/5)mũ 2-9/25=0
(3x-1/2)mũ 3+1/9=0
câu1
(3x-1).(1/2x5)=0
=>3x-1=0 hoặc 1/2x5=0
=>x=1/3 =>x=0
câu2
1/4+1/3 :(2x-1)=5
=> 1/3:(2x-1)=19/4
=>2x-1 =57/4
=>2x=61/4
=>x=61/8
còn hai câu sau bn ghi đề mik ko hỉu
1.
a)(3x-1)(1/2x5)=0
=>3x-1=0 hoặc 1/2x5=0
3x=0+1 x=0:1/2:5
x=1/3 x=0
Vậy x=1/3 hoặc x=0
b)1/4+1/3:(2x-1)=5
1/3:(2x-1)=5-1/4=20/4-1/4=19/4
2x-1=1/3:19/4=1/3*4/19=4/57
2x=4/57+1=4/57+57/57=61/57
x=61/57:2=61/57*1/2=61/114
Vậy x=61/114
c)(2x+2/5)2-9/25=0=02-9/25
=>2x+2/5=0
2x=0-2/5
x=-2/5:2=-2/5*1/2
x=-1/5
Vậy x=-1/5
d)(3x-1/2)3+1/9=0=03+1/9
=>3x-1/2=0
3x=0+1/2
x=1/2:3=1/2*1/3
x=1/6
Vậy x=1/6
Làm nhiêu đó chết người đó bạn , đề nhiều số nữa
tìm x:
(2x+3/5)mũ 2-9/25=0
(2x-3/5)^2-9/25=0
(2x-3/5)^2=9/25
2x-3,5=3/5
2x=3/5+3/5
x=6/5:2=3/5
(2x +3/5) mũ 2-9/25=0
( 2x + 3/5 )2 - 9/25 = 0
( 2x + 3/5 )2 = 0 + 9/25
( 2x + 3/5 )2 = 9/25
( 2x + 3/5 )2 = ( 3/5 )2
=> 2x + 3/5 = 3/5
=> 2x = 3/5 - 3/5
=> 2x = 0
=> x = 0 : 2
=> x = 0
\(\left(2x+\frac{3}{5}\right)^2-\frac{9}{25}=0\)
\(\left(2x+\frac{3}{5}\right)^2=\frac{9}{25}\)
\(\left(2x+\frac{3}{5}\right)^2=\left(\pm\frac{3}{5}\right)^2\)
\(2x+\frac{3}{5}=\pm\frac{3}{5}\)
TH1: TH2:
\(2x+\frac{3}{5}=\frac{3}{5}\) \(2x+\frac{3}{5}=-\frac{3}{5}\)
\(2x=\frac{3}{5}-\frac{3}{5}\) \(2x=-\frac{3}{5}-\frac{3}{5}\)
\(2x=0\) \(2x=-\frac{6}{5}\)
\(x=0:2\) \(x=-\frac{6}{5}:2\)
\(x=2\) \(x=-\frac{3}{5}\)
a) (2x+3/5)2-9/25=0
b)3(3x-1/2)3+1/9=0
Tìm x
1. (3x+5)(4-3x)=0
2. 9(3x-2)=x(2-3x)
3. 25x^2 -2=0
4. x^2- 25=6x-9
5. (2x-1)^2-(2x+5)(2x-5)=18
6. x^3-8=(x-2)^3
7. x^3-4x^2+4x=0
8. x^2- 25+2(x+5)=0
9. 2(x^2+8x+16)- x^2+4=0
10. x^2(x-2)+7x=14
(3x+5)(4-3x)=0
3x+5 =0 hoặc 4-3x=0
3x=-5 hoặc 3x=-4
x=-5/3 hoặc x=-4/3
9(3x-2)=x(2-3x)
9(3x-2)-x(3x-2)=0
(3x-2)(9-x)=0
3x-2=0 hoặc 9-x=0
3x=2 hoặc x= -9
x =2/3 hoặc x=-9
vậy x =2/3 ; x= -9
25x^2 - 2=0
(5x)^2 -√2^2=0
(5x-√2)(5x+√2)=0
5x=√2 hoặc 5x = -√2
x=√2/5 hoặc x= -√2/5
vậy x=√2/5 ; x=-√2/5