tim giup mk vs nha dg can gap
(x-12) - (2x+31) = 6
2(x+7) - 3(x-2) = -2
(3x+19) (11-x) = 0
Tim x thuoc \(Q\):
a) |5.(2x+3)|+|2.(2x+3)|+|2x+3|=16
b)|x2+|6x-2|| =x2+4
c)3x -|2x+1|=2
d)2.|x2+|x-1||=2x2+2
Cac anh chi CTV va cac ban giup mk nhe, mk dg can gap lem, nhanh len nhoa!! Tks truoc
\(\left|5\left(2x+3\right)\right|+\left|2\left(2x+3\right)\right|+\left|2x+3\right|=16\)
\(=8\left(2x+3\right)=16\)
\(\Rightarrow2x+3=2\)
\(\Rightarrow x=-\frac{1}{2}\)
Moi nguoi oi giup em gap vs:
tim x
a,6x^2-(2x-3)(3x+2)-1=0
b,(x-3)(x+7)-(x+5)(x-1)=0
moi nguoi co giup nhanh nhat co the ah!!
Ai trả lời câu này giúp em và nhỏ Vi với
a.\(6x^2-\left(2x-3\right)\left(3x+2\right)-1=0\Leftrightarrow6x^2-\left(6x^2-2x-6\right)-1=0\)
\(\Leftrightarrow2x+5=0\Leftrightarrow x=-\frac{5}{2}\)
b. \(\left(x-3\right)\left(x+7\right)-\left(x+5\right)\left(x-1\right)=0\Leftrightarrow x^2+4x-21-\left(x^2+4x-5\right)=0\)
\(\Leftrightarrow-16=0\)
Vậy không có x thỏa mãn.
cho M=((x+2/3x)+(2/x+1)-3):(2-4x/x+1)-(3x-3x^2+1/3x)
a. rut gon M
b. tim x sao cho M<1/3
c. tim xϵZ de MϵZ
giup mk vs, mk dang can gap a
Các bn giup mk vs. Mk dag can gap
Tim x€Z biết:
-12.(x-5)+7.(3-x)=5
Ai nhanh,đung minh tick cho
\(-12.\left(x-5\right)+7.\left(3-x\right)=5\)
\(-12x+60+21-7x=5\)
\(-12x-7x+81=5\)
\(-19x+81=5\)
\(-19x=5-81\)
\(-19x=-76\)
\(x=\left(-76\right):\left(-19\right)\)
\(x=4\)
Học tốt nhé bn !!!!!
-12 ( x- 5 ) + 7.(3-x) =5
-12x+60+21-7x =5
60+21-5 =12x+7x
76 =19x
x = 76:19
x = 4
Mn giup mk vs ak mk dg can ak
A. Tìm x biết : 5(x+2) – x^2 – 2x =0
Tìm giá trị của m để f (x) = x^3 + x2-11x + m
\(5\left(x+2\right)-x^2-2x=0\)
\(\Rightarrow5\left(x+2\right)-\left(x^2+2x\right)=0\)
\(\Rightarrow5\left(x+2\right)-x\left(x+2\right)=0\)
\(\Rightarrow\left(5-x\right)\left(x+2\right)=0\)
\(\Rightarrow\orbr{\begin{cases}5-x=0\\x+2=0\end{cases}}\)\(\Rightarrow\orbr{\begin{cases}x=5\\x=-2\end{cases}}\)
tim m biet
a) (x^2-x+1)x-(x+1)x^2+m= -2x^2+x+5
b) -x^2(x^2+x+1+2)= -x^4-x^3-x^2+m
giup vs nhanh mk dag can gap
a) (x-12)-(2x+31) = 6
b) 2(x+7)-3(x-2)= -2
c) (3x+19) (11-x) = 0
d) x+3-3(x+5) = x-9
e) -2 (x+1) +5 (x-2) = x-14
Mình trả lời câu b cho bạn nhé
2[x+7]-3[x-2]=-2
2x-14-3*x+6=-2
2x-3x-14+6=-2
-x-14+6=-2
-x-14=-2-6
-x-14=-8
-x=-8+14
-x=6
<=>x=-6
Tim X
1) 5x = 120 : 2
2) 3x +27 + 45
3) 73 + x - 122 = 234 : 2
4) 32 - 2 ( x - 1 ) = 12
5)3 ( x + 1 ) - 15 = 36
6) 32 - ( 4x - 16 ) = 21
7) 13 x - 3x = 500
8) 9x + x - 35 = 68
Mn giup em nha, em can gap!
1) 5x = 120 : 2
5x = 60
x = 60 : 5
x = 12.
2) 3x + 27 = 45
3x = 45 - 27
3x = 18
x = 18 : 3
x = 6.
3) 73 + x - 122 = 234 : 2
73 + x - 122 = 117
73 + x = 117 + 122
73 + x = 239
x = 239 - 73
x = 166.
4) 32 - 2 ( x - 1 ) = 12
2 ( x - 1 ) = 32 - 12
2 ( x - 1 ) = 20
x - 1 = 20 : 2
x - 1 = 10
x = 10 + 1
x = 11.
5) 3 ( x + 1 ) - 15 = 36
3 ( x + 1 ) = 36 + 15
3 ( x + 1 ) = 51
x + 1 = 51 : 3
x + 1 = 17
x = 17 - 1
x = 16.
6) 32 - ( 4x - 16 ) = 21
4x - 16 = 32 - 21
4x - 16 = 11
4x = 11 + 16
4x = 27
x = 27 : 4
x = 6,75.
7) 13x - 3x = 500
( 13 - 3 )x = 500
10x = 500
x = 500 : 10
x = 50.
8) 9x + x - 35 = 68
9x + 1x - 35 = 68
9x + 1x = 68 + 35
9x + 1x = 103
( 9 + 1 )x = 103
10x = 103
x = 103 : 10
x = 10,3.
1) 5x = 120 : 2
5x = 60
x = 60 : 5
x = 12.
2) 3x + 27 = 45
3x = 45 - 27
3x = 18
x = 18 : 3
x = 6.
3) 73 + x - 122 = 234 : 2
73 + x - 122 = 117
73 + x = 117 + 122
73 + x = 239
x = 239 - 73
x = 166.
4) 32 - 2 ( x - 1 ) = 12
2 ( x - 1 ) = 32 - 12
2 ( x - 1 ) = 20
x - 1 = 20 : 2
x - 1 = 10
x = 10 + 1
x = 11.
5) 3 ( x + 1 ) - 15 = 36
3 ( x + 1 ) = 36 + 15
3 ( x + 1 ) = 51
x + 1 = 51 : 3
x + 1 = 17
x = 17 - 1
x = 16.
6) 32 - ( 4x - 16 ) = 21
4x - 16 = 32 - 21
4x - 16 = 11
4x = 11 + 16
4x = 27
x = 27 : 4
x = 6,75.
7) 13x - 3x = 500
( 13 - 3 )x = 500
10x = 500
x = 500 : 10
x = 50.
8) 9x + x - 35 = 68
9x + 1x - 35 = 68
9x + 1x = 68 + 35
9x + 1x = 103
( 9 + 1 )x = 103
10x = 103
x = 103 : 10
x = 10,3.
1) (-1005).(x cong 2 ) bang 0
2) x cong x cong x cong 91 bang -2
3) / 5x cong 1/ bang 11
( thong cam nha , may mik k viet dc dau cong vs bang )
mik dg gap , giup mik nhe !
BÀI \(1\):
\(\left(-1005\right).\left(x+2\right)=0\)
\(x+2=0:\left(-1005\right)\)
\(x+2=0\)
\(x=0-2\)
\(x=-2\)
BÀI \(2\):
\(x+x+x+91=-2\)
\(3x=\left(-2\right)-91\)
\(3x=-93\)
\(x=\left(-93\right):3\)
\(x=-31\)
BÀI \(3\):
\(\left|5x+1\right|=11\)
Có hai trường hợp:
\(TH^{ }1:_{ }5x+1=11\)
\(5x=11-1\)
\(5x=10\)
\(x=10:5\)
\(x=2\)
\(TH2:^{ }5x+1=-11\)
\(5x=\left(-11\right)-1\)
\(5x=-12\)
\(x=\left(-12\right):5\)
\(x=-2,4\)
\(k\)\(minh\)\(nhe\)\(.\)