a) Ta có: \(3x\left(6x-4\right)-2x\left(9x-1\right)=40\)
\(\Leftrightarrow18x^2-12x-18x^2+2x=40\)
\(\Leftrightarrow-10x=40\)
hay x=-4
Giải pt
1, 9x^2-1 =(3x+1)(4x+1)
2, 2x^3+3x^2-32x=48
3, (2x+5)^2-(x+2)^2=0
4, 2x^3+6x^2=x^2+3x
Giải pt
a)căn x^2-4x+4=x+3
a)căn 9x^2+12x+4=4x
a)căn x^2-8x+16=4-x
a)căn 9x^2-6x+1-5x=2
a)căn 25-10x+x^2-2x=1
a)căn 25x^2-30x+9=x-1
a)căn x^2-6x+9-x-5=0
a)2x^2-căn 9x^2-6x+1=-5
b)căn x+5=căn 2x
b)căn 2x-1=căn x-1
b)căn 2x+5=căn 1-x
b)căn x^2-x=căn 3-x
b)căn 3x+1=căn 4x-3
b)căn x^2-x=3x-5
b)căn 2x^2-3=căn 4x-3
b)căn x^2-x-6=căn x-3
Giúp mình với ạ
Cho x thỏa mãn \(x^4-6x^2+11x^2-6x+1=0\)
Tính \(A=\frac{2x^2-6x+1}{3x^2-9x-1}\)
Giải các phương trình :
a) \(3x^2-6x-4=4\left(x-1\right)\sqrt{3x+1}\)
b) \(\sqrt{6x-1}+\sqrt{9x^2-1}=6x-9x^2\)
c) \(3\left(\sqrt{2x-1}+\sqrt{x+3}\right)-2\sqrt{2x^2+5x-3}=3x+4\)
giải phương trình:\(\frac{2x}{6x^2-x+3}+\frac{5x}{4x^2+5x+2}+\frac{x}{2x^2+3x+1}=\frac{1}{3}\)
b, \(\frac{1}{x+1}+\frac{2}{x+2}+\frac{1}{x+3}=\frac{1}{x+4}+\frac{2}{x+5}+\frac{1}{x+6}\)
c, \(x^2+\frac{9x^2}{\left(x+3\right)^2}=7\)
d,\(\frac{1}{x-1}+\frac{1}{x}+\frac{1}{x+1}+\frac{1}{x+2}+\frac{1}{x+3}=0\)
e,\(\frac{9x}{x^2-2x+3}=\frac{5x^2+9x+15}{x^2+3x+3}\)
6) \(\sqrt{x^2+12x+36}=-x-6\)
7) \(\sqrt{9x^2-12x+4}=3x-2\)
8) \(\sqrt{16-24x+9x^2}=2x-10\)
9) \(\sqrt{x^2-6x+9}==2x-3\)
10) \(\sqrt{x^2-3x+\dfrac{9}{4}}=\dfrac{3}{x}x-4\)
a) \(\sqrt{4x+20}+\sqrt{x+5}-\dfrac{1}{3}\sqrt{9x+45}=4\)
b) \(\sqrt{36x-36}-\sqrt{9x-9}-\sqrt{4x-4}=16-\sqrt{x-1}\)
c) \(\sqrt{x^2+6x-9}-2\sqrt{x^2-2x+1}+\sqrt{x^2}=0\)
1) giải pt:
a) \(\sqrt{3x+10}=4\)
b) \(\sqrt{9x^2-6x+1}=\sqrt{x^2+8x+16}\)
c) \(\sqrt{2x+1}=3\)
d) \(\sqrt{2x+1}+1=x\)
giúp mk vs ah
Gỉai các phương trình:
a) \(\sqrt{1-6X+9X^2}\) = 9
b) \(\sqrt{2X-3}\) - \(\sqrt{x+1}\) = 0
c) \(\sqrt{9x^2+12x+4}\) - 2= 3x
