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x+1/3-4=-1
=>x+1/3=-1+4
=>x+1/3=3
=>x =3-1/3
=>x =8/3
Vậy x = 8/3
(2/25-1,008):4/7:(13/4-6/5/9)*36/17
=(2/25-126/125).7/4:(13/4-59/9)*36/17
=(10/125-126/125).7/4:(117/36-236/36)*36/17
=-116/125.7/4.(-36/119).36/17
=-203/125.(-1296/2023)=263088/252875
Mình tính ko nhanh đâu

a) A(x) = 0
=> 6x + 3 - (2x + 1)
=> 6x + 3 - 2x - 1 = 0
=> (6x - 2x) + (3 - 1) = 0
=> 4x + 2 = 0
=> 4x = -2
=> x = -2 : 4
=> x = -0,5
Vậy ...
b) B(x) = 0
=> (x2 + 5x - 5) - (5x - 5) = 0
=> x2 + 5x - 5 - 5x + 5 = 0
=> x2 + 5x - 5x = 0
=> x2 = 0
=> x = 0
Vậy ...
c) C(x) = x2 - 8x
=> x2 - 8x = 0
=> x2 = 8x
=> x = 8 ( Chia mỗi bên cho x)
Vậy ...
d) D(x) = x2 - 5x + 4
=> x2 - x - 4x + 4 = 0
=> x.(x - 1) - 4.(x - 1) = 0
=> (x - 4).(x - 1) = 0
=> \(\left[{}\begin{matrix}x-4=0\\x-1=0\end{matrix}\right.\) => \(\left[{}\begin{matrix}x=4\\x=1\end{matrix}\right.\)
Vậy x = 4; x = 1 là nghiệm của D(x)

\(\left[\frac{-2}{5}x^3.\left(2x-1\right)^m+\frac{2}{5}x^{m+3}\right]:\left(\frac{-2}{5}x^3\right)\)
\(=\left[\frac{2}{5}x^3\left(2x+1\right)^m+\frac{2}{5}x^3.\left(\frac{2}{5}\right)^m\right]:\left(\frac{-2}{5}x^3\right)\)
\(=\left\{\frac{2}{5}x^3.\left[\left(2x+1\right)^m+\left(\frac{2}{5}\right)^m\right]\right\}:\left(\frac{-2}{5}x^3\right)\)
\(=\left\{\frac{2}{5}x^3.\left[2x+\frac{7}{5}\right]^m\right\}:\frac{-2}{5}x^3\)
\(=-\left(2x+\frac{7}{5}\right)^m\)
đến đây thì mình chịu

1, x2 = 0
=> x=0
2,x2=1
=> x= 1 hoặc x=-1
3,x2=3
=>\(x=\sqrt{3}\)
4,x2=6
=>\(x=\sqrt{6}\)
5,x2=7
=>\(x=\sqrt{7}\)

\(\dfrac{5}{6}x-\dfrac{3}{4}=\dfrac{-1}{4}+\dfrac{2}{3}\)
\(\Leftrightarrow\dfrac{5}{6}x=\dfrac{7}{6}\)
\(\Rightarrow x=\dfrac{7}{5}\)
b) \(-1\dfrac{1}{2}-\dfrac{2}{3}x=\dfrac{5}{6}-\left(\dfrac{-2}{5}\right)\)
\(\Leftrightarrow\dfrac{2}{3}x=-\dfrac{41}{15}\)
\(\Rightarrow x=-\dfrac{41}{10}\)
c) \(\left(\dfrac{4}{5}:x+1,5\right):\dfrac{2}{3}=-1,5\)
\(\Leftrightarrow\dfrac{8+15x}{10x}.\dfrac{3}{2}=\dfrac{-3}{2}\)
\(\Leftrightarrow\dfrac{24+45x}{20x}=\dfrac{-3}{2}\)
\(\Leftrightarrow-60x=48+90x\)
\(\Rightarrow x=-0,32\)
d) \(\dfrac{4}{3}x-\dfrac{2}{3}=\dfrac{1}{4}-x\)
\(\Leftrightarrow\dfrac{4x-2}{3}=\dfrac{1-4x}{4}\)
\(\Rightarrow16x-8=3-12x\)
\(\Rightarrow x=\dfrac{11}{28}\)
= 1
1