a) (x2 - 5x)2 + 10(x2 - 5x) + 24 = 0
b) (2x + 1)2 - 2x - 1 = 2
c) x(x - 1)(x2 - x + 1) - 6 = 0
d) (x2 + 1)2 + 3x(x2 + 1) + 2x2 = 0
a) (x2 - 2x)2 - 6x2 +12x + 9 = 0
b) (x2 + x + 1)(x2 + x + 2) = 12
c) (2x2 - 3x + 1)(2x2 + 5x + 1) - 9x2 = 0
chứng tỏ rằng các phương trình sau đây vô nghiệm :
a)2(x+1)=2x-1 b)x2+4x+5=0
c)4x2+2x+1=0 d)x2-x+1=0
Giải các phương trình
1,\(3x-1=0\\\) 4, \(\dfrac{x}{3}-\dfrac{x}{5}=4\)
2, \(2-x=3x+1\) 5, \(\dfrac{x-1}{4}+\dfrac{2x+1}{6}=\dfrac{3}{2}\)
3, \(2\left(x-2\right)-1=5x\)
Giải các phương trình sau :
a) \(0,25x+1,5=0\)
b) \(6,36-5,3x=0\)
c) \(\dfrac{4}{3}x-\dfrac{5}{6}=\dfrac{1}{2}\)
d) \(-\dfrac{5}{9}x+1=\dfrac{2}{3}x-10\)
Giải các phương trình
a)3x-2=2x-3 c)11x+42-2x=100-9x-22
b)2x+3=5x+9 d)2x-(3-5x)=4(x+3)
e)\(\dfrac{3x+2}{2}-\dfrac{3x+1}{6}=\dfrac{5}{3}+2x\)
f)\(\dfrac{x+4}{5}-x+4=\dfrac{x}{3}-\dfrac{x-2}{2}\)
g)(2x+1)(x-1)=0
h)(x+\(\dfrac{2}{3}\))(x-\(\dfrac{1}{2}\))=0
i)(3x-1)(2x-3)(2x-3)(x+5)=0
k)3x-15=2x(x-5)
m)\(\left|x-2\right|=3\)
n)\(\left|x+1\right|=\left|2x+3\right|\)
j)\(\dfrac{7x-3}{x-1}=\dfrac{2}{3}\)
đ)\(\dfrac{2\left(3-7x\right)}{1+x}=\dfrac{1}{2}\)
y)\(\dfrac{x+5}{x-5}-\dfrac{x-5}{x+5}=\dfrac{20}{x^2-25}\)
\(\dfrac{1}{x-1}+\dfrac{2}{x+1}=\dfrac{x}{x^2-1}\)
a) x3 + x2 + x + 1 = 0
b) x3 - 6x2 + 11x - 6 = 0
c) x3 - x2 - 21x + 45 = 0
d) x4 + 2x3 - 4x2 - 5x - 6 = 0
1) (3x - 2)(4x + 5) = 0
2) (4x + 2)(x2 + 3) = 0
3) (2x + 7)(x - 3)(5x - 1) = 0
4) x2 - 3x = 0
5) x2 - x = 0
1) Tìm m sao cho
Phương trình 3x\(^3\) + 9x\(^2\) + ( 5m-3) + m-6=0 có nghiệm x = -3
2) Tìm để 2 phương trình sau tương đương
\(\dfrac{3-x}{4}\)= \(\dfrac{9\left(x+7\right)}{10}\)+ 1 và 23x - m = 0