\(\frac{3x}{x-3}-\frac{x-3}{x+3}=2\left(đkxđ:x\ne\pm3\right)\)
\(< =>\frac{3x\left(x-3\right)-\left(x-3\right)^2}{\left(x-3\right)^2}=2\)
\(< =>\frac{3x\left(x-3\right)}{\left(x-3\right)^2}=2-\frac{\left(x-3\right)^2}{\left(x-3\right)^2}=1\)
\(< =>3x\left(x-3\right)=\left(x-3\right)^2\)
\(< =>3x=x-3\)
\(< =>3x-x=-3\)
\(< =>x=-\frac{3}{2}\left(tmđk\right)\)
1) \(\dfrac{7x-3}{x-1}\) = \(\dfrac{2}{3}\)
2) \(\dfrac{2\left(3-7x\right)}{1+x}\) = \(\dfrac{1}{2}\)
3) \(\dfrac{x^{2^{ }}-6}{x}\) = x + \(\dfrac{3}{2}\)
4) \(\dfrac{5}{3x+2}\) = 2x - 1
5) \(\dfrac{\left(x^2+2x\right)-\left(3x+6\right)}{x-3}\) = 0
6) \(\dfrac{1}{x-2}\) + 3 = \(\dfrac{3-x}{x-2}\)
giải pt (3x/x^2-x+3)-(2x/x^2-3x+3)=1
help me m cần gấp ạ
a. 3x-1=-17
b. 40-(3x-8)=3(3-5x)
c. x/2(x-2) + x/2x+2 = 2x/(x+1)(x-2) e cảm ơn mng nhìuu
Giai phuong trinh:
a)\(\frac{4+9x}{9x^21}=\frac{3}{3x+1}-\frac{2}{1-3x}\)
b)\(\frac{2x-3}{x+1}+\frac{x^2-5x+10}{\left(x+1\right)\left(x-3\right)}=\frac{3x-5}{x-3}\)
c)\(\frac{x\left(x+4\right)}{2x-3}=\frac{x^2+4}{2x-3}+1-\frac{2}{3-2x}\)
d)\(\frac{1}{x+2}+\frac{x}{x-3}=1-\frac{5x}{\left(x+2\right)\left(3-x\right)}-\frac{1}{x+2}\)
Giair ca phương trình sau
1/ \(\dfrac{7x-3}{x-1}=\dfrac{2}{3}\)
2/ \(\dfrac{5x-1}{3x+2}=\dfrac{5x-7}{3x-1}\)
3/ \(\dfrac{1-x}{x+1}+3=\dfrac{2x+3}{x+1}\)
4/ \(\dfrac{1-6x}{x-2}+\dfrac{9x+4}{x+2}=\dfrac{x\left(3x-2\right)+1}{x^2-4}\)
5/ \(\dfrac{3x+2}{3x-2}-\dfrac{6}{2+3x}=\dfrac{9x^2}{9x^2-4}\)
6/ \(1+\dfrac{1}{x+2}=\dfrac{12}{8-x^3}\)
Giair phương trình
1) 2x2-3x-2=0 7) (2x2-3x-4)2=(x2-x)2
2) 4x2-7x-2=0 8) \(\dfrac{2}{x+1}-\dfrac{3}{x+2}=\dfrac{1}{3x+3}\)
3) 4x2+5x-6=0 9) \(\dfrac{x}{x-3}=\dfrac{1}{x+2}\)
4) 4x2+5x-9=0 10) \(\dfrac{4}{2x-3}-\dfrac{7}{3x-5}=0\)
5) 5x2-18x-8=0 11) \(\dfrac{7}{x+2}+\dfrac{2}{x+3}=\dfrac{1}{x^2+5x+6}\)
6) (3x2+2x+4)2=(x2-4)2 12) \(\dfrac{4}{x-2}+\dfrac{x}{x+1}=\dfrac{x^2-2}{x^2-x-2}\)
Giúp em vs em đag cần câu tl gấp
em c.ơn trước
a) 5-4x=3x-9
b) (x-4)(3x+9)=0
c) (x/(x+4))+(12/(x-4))=(4x+48)/(x*x-16)
d) 4-2x=7-x
e) (x+4)(8-4x)=0
f) (x/(x+5))+(11/(x-5))=(x+55)/(x*x-25)
g) ((3x+2)/2) - ((3x+1)/6)= (5/3) +2x
h) 2x-(3-5x)=4(x+3)
i) 3x -6+x=9-x
k) 2t-3+5t= 4t+12
m.n giúp mik ạ ...
