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Thực hiện các phép tính:
a)\(\dfrac{x+3}{x^2-9}-\dfrac{3}{x^2-3x}\)
b)\(\dfrac{7}{x}-\dfrac{x}{x-6}+\dfrac{36}{x^2-6x}\)
c)\(\dfrac{3}{x}-\dfrac{x}{x-1}-\dfrac{x^2}{x+1}-\dfrac{x^2-3}{x^3-x}\)
a) (X-2)(x+3)-3(4x-2)(x-4)^{^{ }2}b) dfrac{2x^2+1}{8}-dfrac{7x-2}{12}dfrac{x^2-1}{4}-dfrac{x-3}{6}c) x-dfrac{2x-2}{5}+dfrac{x+8}{6}7+dfrac{x-1}{3}d) left(2x+5right)^2left(x+2right)^2e) x^2-5+60g) 2x^3+6x^2x^2+3xh) left(x+dfrac{1}{2}right)^2+2left(x+dfrac{1}{x}right)-80mọi người giúp e với ạ
Đọc tiếp
a) (X-2)(x+3)-3(4x-2)=(x-4)\(^{^{ }2}\)
b) \(\dfrac{2x^2+1}{8}-\dfrac{7x-2}{12}=\dfrac{x^2-1}{4}-\dfrac{x-3}{6}\)
c) \(x-\dfrac{2x-2}{5}+\dfrac{x+8}{6}=7+\dfrac{x-1}{3}\)
d) \(\left(2x+5\right)^2=\left(x+2\right)^2\)
e) \(x^2-5+6=0\)
g) \(2x^3+6x^2=x^2+3x\)
h) \(\left(x+\dfrac{1}{2}\right)^2+2\left(x+\dfrac{1}{x}\right)-8=0\)
mọi người giúp e với ạ
a) 6-7x+7=-8x+12
b) \(\dfrac{\text{4x-1}}{8}\)\(\)=\(\dfrac{6-x}{2}\)-\(\dfrac{1}{4}\)
c) 2x(x-3)+7x-21+0
d) \(\dfrac{x}{x-3}\)+\(\dfrac{x-2}{x+3}\)\(\dfrac{2\left(x^2+6\right)}{x^2-9}\)
LM
8 tháng 2 2022 lúc 20:37
a) \(\dfrac{5x-2}{3}+x=1+\dfrac{5-3x}{2}\)
b) \(\dfrac{\left(3x-1\right)\left(x+2\right)}{3}-\dfrac{2x^2+1}{2}=\dfrac{11}{2}\)
c) \(x-\dfrac{5x+2}{6}=\dfrac{7-3x}{4}\)
d) \(\dfrac{x-1}{2}+\dfrac{x-1}{3}-\dfrac{x-1}{6}=2\)
giải các phương trình sau:a.2x + 3 7x - 7b. dfrac{x}{x+2}+dfrac{x-1}{x-2}dfrac{2x^2+x}{x^2-4}c.|x-1|1d.6x - 2 2x + 10e. dfrac{x}{2}+dfrac{x+1}{3}dfrac{5}{2}f.|x-1|x+2g.9x - 6 3x+12h.x(x-1)+3(x-1)0i.dfrac{7}{x}+dfrac{2}{x+1}dfrac{x+23}{xleft(x+1right)}j.8x - 36x +9k. |x-1|-45l.dfrac{x-5}{x^2-16}+dfrac{3}{x+4}dfrac{7}{x-4}
Đọc tiếp
giải các phương trình sau:
a.2x + 3 = 7x - 7
b. \(\dfrac{x}{x+2}+\dfrac{x-1}{x-2}=\dfrac{2x^2+x}{x^2-4}\)
c.|x-1|=1
d.6x - 2 = 2x + 10
e. \(\dfrac{x}{2}+\dfrac{x+1}{3}=\dfrac{5}{2}\)
f.|x-1|=x+2
g.9x - 6 = 3x+12
h.x(x-1)+3(x-1)=0
i.\(\dfrac{7}{x}+\dfrac{2}{x+1}=\dfrac{x+23}{x\left(x+1\right)}\)
j.8x - 3=6x +9
k. |x-1|-4=5
l.\(\dfrac{x-5}{x^2-16}+\dfrac{3}{x+4}=\dfrac{7}{x-4}\)
1/ \(\dfrac{x+4}{4}+\dfrac{3x-7}{5}=\dfrac{7x+2}{20}\)
2/ \(\dfrac{x}{6}+\dfrac{1-3x}{9}=\dfrac{-x+1}{12}\)
3/ \(\dfrac{x-3}{3}-\dfrac{x+2}{12}=\dfrac{2x-1}{4}\)
4/ \(\dfrac{x-2}{4}-\dfrac{2x+3}{3}=\dfrac{x+6}{12}\)
5/ \(\dfrac{2x-1}{12}-\dfrac{3-x}{18}=\dfrac{-1}{36}\)
1.\(\left(x-5\right)^2+3\left(x-5\right)=0\)
\(2,\dfrac{2x-1}{3}-\dfrac{5x+2}{7}=x+13\)
\(3,\dfrac{x-1}{x+2}-\dfrac{x}{x-2}=\dfrac{7x-6}{4-x^2}\)
Giải các phương trình sau:
\(a.\dfrac{4x-5}{x-1}=2+\dfrac{x}{x-1}\)
\(b.\dfrac{7}{x+2}=\dfrac{3}{x-5}\)
\(c.\dfrac{14}{3x-12}-\dfrac{2+x}{x-4}=\dfrac{3}{8-2x}-\dfrac{5}{6}\)
\(d.\dfrac{x+1}{x-1}-\dfrac{x-1}{x+1}=\dfrac{16}{x^2-1}\)
thực hiện phép tính
\(\dfrac{x}{x-3}-\dfrac{6}{x}-\dfrac{9}{x^2-3x}\)
\(\dfrac{7}{x}-\dfrac{x}{x+6}+\dfrac{36}{x^2+6x}\)
\(\dfrac{6}{x-3}-\dfrac{2x-16}{x^2-9}-\dfrac{4}{x+3}\)