Tìm x

12(x – 1) = 0

 45 + 5(x – 3) = 70                 

  3.x – 18 : 2 = 12              

  5x + 2x = 6² - 5⁰           

  5x + x = 150 : 2 + 3

Giải pt:

1) \(\frac{5x}{2x+3}\)+ 6 . \(\frac{5x+3}{x}\)= -3

2) \(\left(\frac{x+1}{x}\right)^2\)- 4.\(\left(\frac{x+1}{x}\right)\)+ 3 = 0

3) ( \(x^2\)+ \(3x-4\)).( \(x^2\)+\(x-6\)) = 24

4) \(\left(5x+4\right)^2\).\(\left(5x+8x\right)\)= 16

tính ( 3x^3 - 5x^2 + 5x -2 ) : ( x^2 -x +1)

b) \(\frac{x+1}{x-3}\)-\(\frac{x-1}{x+3}\)+\(\frac{6x-42}{x^2-49}\)

Giải phương trình 

\(\left(x+3\right)\sqrt{\left(4-x\right)\left(12+x\right)}=28-x\)

\(\sqrt{3x^3-5x^2+5x+5x-2}=\frac{x^2}{2}+x-\frac{1}{2}\)

\(\sqrt{x-2}+\sqrt{10-x}=x^2-12x+40\)

\(2x^3+x^2+x-1=x\sqrt{x^2}+x+1-\sqrt[3]{2x+2}\)

\(3x-4+\sqrt{2x+3}=\left(1-x\right)\left(x^2-2\sqrt{2x+3}\right)\)

\(x^3-5x^2+13x-6=\left(x-2\right)\sqrt{x+3}-2\sqrt{5x-1}\)

GPT \(x^2+5x+2=2\sqrt[3]{x^2+5x-2}\)

Bài 1: Tìm x,y biết :

a) \(\frac{2x+3}{5x+2}=\frac{4x+5}{10x+2}\)

b)\(\frac{3x-1}{40-5x}=\frac{25-3x}{5x-34}\)

Bài 2: Timd x,y,z biết:

a)\(5x=-10y=6zvàxyz=-30000\)

b)\(\frac{x-y}{3}=\frac{x+y}{13}=\frac{xy}{200}\)

tìm x biết:

a)\(2x^2+5x+8+\sqrt{x}=x^2+3x+35+x^2+2x-7\)

b)\(3\sqrt{x}+7x+5=\sqrt{x}+4x-6+3x+18\)

c)\(8\sqrt{x}+2x-9=5x+7+6\sqrt{x}-3x-12\)

d)\(2\sqrt{3x}+11x-18=5x+3+6\sqrt{3x}+6x-21\)

Cho \(P\left(x\right)=x^{2009}-5x^{2007}+5x^{2005}-...-5x^3+5x-5\)

Tinh \(P\left(2\right)\)

Giải phương trình:

\(x^2+2x-1=2\sqrt{3x^3-5x^2+5x-2}\)

\(\sqrt{x^3+1}=x^2-3x+1\)

\(\sqrt{2x+1}+3\sqrt{4x^2-2x+1}=3+\sqrt{8x^3+1}\)