=>(2x-7)(x+5)-(x+5)(3-4x)=0
=>(x+5)(2x-7-3+4x)=0
=>(x+5)(6x-10)=0
=>x=-5 hoặc x=5/3
=>(2x-7)(x+5)-(x+5)(3-4x)=0
=>(x+5)(2x-7-3+4x)=0
=>(x+5)(6x-10)=0
=>x=-5 hoặc x=5/3
1.giải các pt sau
a)3x-7/2+x-1/3=-16
b)x-x-1/3=2x+1/5
c)2x-1/3-5x+2/7=x+13
d)2x-3/3-x-3/6=4x+3/5-17
Bài1: giải các pt sau:
a, 3-4x+24+6x= x+27+3x
b, 5-(6-x)=4(3-2x)
c, x-(x+1)/3 = (2x+1)/5
d,(2x-1)/3 - (5x+2)/7 = x+13
Bài 2:
a, (x-1)(3x+1)=0
b, (x-5)(7-x)=0
c, ( x-1)(x+5)(-3x+8)=0
d, x(x^2 - 1 )=0
Giúp mình 2 bài này với , mình đang cần gấp , CẢM ƠN M.N ạ><
Giải phương trình sau
2x -1/3 - 5x+2/7= x+13
2x -3/3 - x -3/6 =4x +3/5 -17
giúp giùm em
a.(2x+1)(x-3)=5x+4-2*(x-2)*(x+2)
b.3x-(2x+1)^2=4x^2-(2x-1)(x+1)
c(3x-1)/(x-1)-(2x+5)/(x+3)=1-(4/(x^2+2x-3))
d.3/(4x-20)+15/(50-2x^2)=7/6x+30
Bài 1 : Giải các phương trình sau :
1) x – 8 = 3 – 2(x+ 4)
2) 2(x + 3) – 3(x – 1) = 2
3) 4(x – 5) – (3x – 1) = x – 19
4) 7 – ( x – 2) = 5(2x – 3)
5) 32 – 4(0,5y – 5) = 3y + 2
6) 3(x – 1) – x = 2x – 3
7) x2 + 2x – 4 = –12 + 3x + \(x^2\)
8) x( x – 1) – x(x + 3) = 15
9) x( x – 1) = x(x + 3)
10) (x–1)(x +3) – (x+2)(x–3) = 0
11) (x–2)(x –5) – (x–3)(x–4) = 0
12) (3x – 2)(4x + 3) = 2x(6x – 1)
13) \(4x^2\) – (2x + 1)(2x – 1) = 0
14) (4x–5)(x+3) = (2x – 3)(7+2x)
15) (x + 3)(x – 2) = (x + 1)2
16) (x+7)(x–7) + \(x^2\) – 2 = 2(\(x^2\)+5 )
17) \(\left(x-1\right)^2\) + \(\left(x+3\right)^2\) = 2(x– 2)(x+2)
18) \(\left(x-5\right)^2\) = \(\left(x+3\right)^2\) + 2
Mình đang cần , các bạn giúp mình với ạ !!!
Bài 1: Giải các phương trình sau:
Câu 1.
a) 3x – 2 = 2x – 3 b) 3 – 4y + 24 + 6y = y + 27 + 3y
c) 7 – 2x = 22 – 3x d) 8x – 3 = 5x + 12
e) x – 12 + 4x = 25 + 2x – 1 f) x + 2x + 3x – 19 = 3x + 5
g) 11 + 8x – 3 = 5x – 3 + x h) 4 – 2x + 15 = 9x + 4 – 2x
2. a) 5 – (x – 6) = 4(3 – 2x) b) 2x(x + 2)2 – 8x2 = 2(x – 2)(x2 + 2x + 4)
c) 7 – (2x + 4) = – (x + 4) d) (x – 2)3 + (3x – 1)(3x + 1) = (x + 1)3
e) (x + 1)(2x – 3) = (2x – 1)(x + 5) f) (x – 1)3 – x(x + 1)2 = 5x(2 – x) – 11(x + 2)
g) (x – 1) – (2x – 1) = 9 – x h) (x – 3)(x + 4) – 2(3x – 2) = (x – 4)2
i) x(x + 3)2 – 3x = (x + 2)3 + 1 j) (x + 1)(x2 – x + 1) – 2x = x(x + 1)(x – 1)
3. a) 1,2 – (x – 0,8) = –2(0,9 + x) b) 3,6 – 0,5(2x + 1) = x – 0,25(2 – 4x)
c) 2,3x – 2(0,7 + 2x) = 3,6 – 1,7x d) 0,1 – 2(0,5t – 0,1) = 2(t – 2,5) – 0,7
e) 3 + 2,25x +2,6 = 2x + 5 + 0,4x f) 5x + 3,48 – 2,35x = 5,38 – 2,9x + 10,42
4.a) (5x-2)/3=(5-3x)/2 b)(10x+3)/12=1+((6+8x)/9)
c)2(x+3/5)=5-(13/5+x) d)7/8x-5(x-9)=(20x+1,5)/6
e)(7x-1)/6+2x=(16-x)/5 f)4(0,5-1,5x)=-(5x-6)/3
g)(3x+2)/2-(3x+1)/6=5/3+2x h)(x+4)/5-(x+4)=x/3-(x-2)/2
i) (4x+3)/5-(6x-2)/7=(5x+4)/3+3 k)(5x+2)/6-(8x-1)/3=(4x+2)/5-5
m)(2x-1)/5-(x-2)/3=(x+7)/15 n)1/4(x+3)=3-1/2(x+1)-1/3(x+2)
Bài 2 Tìm giá trị của k sao cho:
a. Phương trình: 2x + k = x – 1 có nghiệm x = – 2.
b. Phương trình: (2x + 1)(9x + 2k) – 5(x + 2) = 40 có nghiệm x = 2
c. Phương trình: 2(2x + 1) + 18 = 3(x + 2)(2x + k) có nghiệm x = 1
1) 4x-10=0 2) 2x^3 + 6x^2 = x^2 + 3x 3) x - 5 = 3 - x 4) (-10x + 5 ) ( 2x - 8 ) = 0
\(\left(x-2\right)^2=\left(2x+3\right)^2\)
\(\frac{4}{2x-3}-\frac{7}{3x-5}=6\)
\(\frac{2}{2x+1}+\frac{x}{4x^2-1}=\frac{7}{2x-1}\)
Bài 8:Giải cácphương trình sau.
a) (3x – 2)(4x + 5) = 0 b) 2x(x – 3) + 5(x – 3) = 0
c) (2x + 1)(3x – 2) = (5x – 8)(2x + 1) d) 3x – 15 = 2x(x – 5)
e) x(2x – 9) = 3x(x – 5) f) (x + 2)(3 – 4x) = x2 + 4x + 4
g) (x –\(\sqrt{2}\)) + 3(x2 – 2) = 0 h) (2x – 5)2 – (x + 2)2 = 0
i) 2x3 + 5x2 – 3x = 0 k) 2x2 – 6x + 1 = 0