Các câu hỏi tương tự
Giải phương trình1) 2x ( x – 3 ) + 5 ( x – 3 ) 02) ( x2 – 4 ) – ( x – 2 ) ( 3 – 2x ) 03) ( 2x – 1 )2 – ( 2x + 5 )2 114) ( 2x + 1 )2 ( 3x – 5 ) 4x2 – 15) 3x2 – 5x – 8 06) ( 2x + 1 )2 ( 3x – 5 ) 4x2 – 17) 3x2 – 5x – 8 08) left|x-5right|39) left|2x-5right|3-x10) left|2x+1right|left|x-1right|11) dfrac{5x+2}{6}-dfrac{8x-1}{3}dfrac{4x+2}{5}-512) dfrac{3x+2}{2}-dfrac{3x+1}{6}2x+dfrac{5}{3}
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Giải phương trình
1) 2x ( x – 3 ) + 5 ( x – 3 ) = 0
2) ( x2 – 4 ) – ( x – 2 ) ( 3 – 2x ) = 0
3) ( 2x – 1 )2 – ( 2x + 5 )2 = 11
4) ( 2x + 1 )2 ( 3x – 5 ) = 4x2 – 1
5) 3x2 – 5x – 8 = 0
6) ( 2x + 1 )2 ( 3x – 5 ) = 4x2 – 1
7) 3x2 – 5x – 8 = 0
8) \(\left|x-5\right|=3\)
9) \(\left|2x-5\right|=3-x\)
10) \(\left|2x+1\right|=\left|x-1\right|\)
11) \(\dfrac{5x+2}{6}-\dfrac{8x-1}{3}=\dfrac{4x+2}{5}-5\)
12) \(\dfrac{3x+2}{2}-\dfrac{3x+1}{6}=2x+\dfrac{5}{3}\)
VT
8 tháng 9 2021 lúc 14:22
Bài 4: Tìm x, biết:
a) 3(2x – 3) + 2(2 – x) = –3 ; b) x(5 – 2x) + 2x(x – 1) = 13 ;
c) 5x(x – 1) – (x + 2)(5x – 7) = 6 ; d) 3x(2x + 3) – (2x + 5)(3x – 2) = 8 ;
e) 2(5x – 8) – 3(4x – 5) = 4(3x – 4) + 11; f) 2x(6x – 2x 2 ) + 3x 2 (x – 4) = 8.
d) (3x – 5)(7 – 5x) – (5x + 2)(2 – 3x) = 4 g) 3(2x - 1)(3x - 1) - (2x - 3)(9x - 1) =0 j) (2x – 1)(3x + 1) – (4 – 3x)(3 – 2x) = 3 k) (2x + 1)(x + 3) – (x – 5)(7 + 2x) = 8 m) 2(3x – 1)(2x + 5) – 6(2x – 1)(x + 2) = - 6
Giai PT a, 6/x^2-1 + 5 = 8x-1/4x+4 - 12x-1/4-4x
b, 2x+1/2x-1 - 2x-1/2x+1 = 8/4x^2 -1
c, 3/2x-16 + 3x-20/x-8 + 1/8 = 13x-102/3x-24
d, x+4/x^2-3x+2 - x+1/x^2 -4x+3 = 2x+5/x^2-4x+3
1) (x+5)2
2) (2x-5y)2
3) (x+8) (x-8)
4) (x+4)3
5) (2x-1)3
Thu gọn biểu thức
(6x+1)(2x-5)
(2x+5)2-2x(2x+8)
(3x-5)(2x-1)-(2x+3)(3x+7)+30x
(X-1)2-(x+1)(x-1)
(3x+2)(9x2-6x+4)-(3+x)(x-3)
\(x\left(2x-1\right)-8< 5-2x\left(1-x\right)\)
Tìm x: 5(3x+5)-4(2x-3)=5x+8(2x-1)
Bài 3: Rút gọn biểu thức (Dùng hằng đẳng thức)1, (x+y)^2-(x-y)^22, (x+y)^3-(x-y)^3-2y^33,(x+y)^2-2(x+y)(x-y)+(x-y)^24,(2x+3)^2-2(2x+3)(2x+5)+(2x+5)^25, 9^8. 2^8-(18^4+1)(18^4-1)
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Bài 3: Rút gọn biểu thức (Dùng hằng đẳng thức)
1, (x+y)\(^2\)-(x-y)\(^2\)
2, (x+y)\(^3\)-(x-y)\(^3\)-2y\(^3\)
3,(x+y)\(^2\)-2(x+y)(x-y)+(x-y)\(^2\)
4,(2x+3)\(^2\)-2(2x+3)(2x+5)+(2x+5)\(^2\)
5, 9\(^8\). 2\(^8\)-(18\(^4\)+1)(18\(^4\)-1)
X+5/4 - 2x-3/3 = 6x-1/8 + 2x-1/12