Tìm x biết:
\(3x^4\) - \(24x\) = 0
Các bn giúp mik vs
Những câu hỏi liên quan
2(x-1)(x+5) - 4x + 4 = 0
Các bn giúp mik vs ạ
\(\Leftrightarrow2\left(x-1\right)\left(x+5\right)-4\left(x-1\right)=0\)
=>(x-1)(x+3)=0
=>x=1 hoặc x=-3
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\(\Leftrightarrow2\left(x-1\right)\left(x+5\right)-4\left(x-1\right)=0\\ \Leftrightarrow\left(x-1\right)\left(x+5-2\right)=0\\ \Leftrightarrow\left(x-1\right)\left(x+3\right)=0\\ \Leftrightarrow\left[{}\begin{matrix}x=1\\x=-3\end{matrix}\right.\)
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tìm x biết:
a)2/3x-3/2x=5/12
b)2/5+3/5.(3x-3,7)=-53/10
c)7/9:(2+3/4x)+5/9=23/27
d)-2/3.x+1/5=3/10
e)|x|-3/4=5/3
f)|2x-1/3|+5/6=1
giúp mik vs mik đang cần gấp bn nào giải mik cũng tick nha
giải hết giúp mik các bn nhé
a; \(\dfrac{2}{3}\)\(x\) - \(\dfrac{3}{2}\)\(x\) = \(\dfrac{5}{12}\)
(\(\dfrac{2}{3}\) - \(\dfrac{3}{2}\))\(x\) = \(\dfrac{5}{12}\)
- \(\dfrac{5}{6}\)\(x\) = \(\dfrac{5}{12}\)
\(x\) = \(\dfrac{5}{12}\) : (- \(\dfrac{5}{6}\))
\(x=\) - \(\dfrac{1}{2}\)
Vậy \(x=-\dfrac{1}{2}\)
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b; \(\dfrac{2}{5}\) + \(\dfrac{3}{5}\).(3\(x\) - 3,7) = \(\dfrac{-53}{10}\)
\(\dfrac{3}{5}\).(3\(x\) - 3,7) = \(\dfrac{-53}{10}\) - \(\dfrac{2}{5}\)
\(\dfrac{3}{5}\).(3\(x\) - 3,7) = - \(\dfrac{57}{10}\)
3\(x\) - 3,7 = - \(\dfrac{57}{10}\) : \(\dfrac{3}{5}\)
3\(x\) - 3,7 = - \(\dfrac{19}{2}\)
3\(x\) = - \(\dfrac{19}{2}\) + 3,7
3\(x\) = - \(\dfrac{29}{5}\)
\(x\) = - \(\dfrac{29}{5}\) : 3
\(x\) = - \(\dfrac{29}{15}\)
Vậy \(x\) \(\in\) - \(\dfrac{29}{15}\)
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c; \(\dfrac{7}{9}\) : (2 + \(\dfrac{3}{4}\)\(x\)) + \(\dfrac{5}{9}\) = \(\dfrac{23}{27}\)
\(\dfrac{7}{9}\): (2 + \(\dfrac{3}{4}\)\(x\)) = \(\dfrac{23}{27}\) - \(\dfrac{5}{9}\)
\(\dfrac{7}{9}\):(2 + \(\dfrac{3}{4}\)\(x\)) = \(\dfrac{8}{27}\)
2 + \(\dfrac{3}{4}\)\(x\) = \(\dfrac{7}{9}\) : \(\dfrac{8}{27}\)
2 + \(\dfrac{3}{4}\)\(x\) = \(\dfrac{21}{8}\)
\(\dfrac{3}{4}x\) = \(\dfrac{21}{8}\) - 2
\(\dfrac{3}{4}\)\(x\) = \(\dfrac{5}{8}\)
\(x\) = \(\dfrac{5}{8}\) : \(\dfrac{3}{4}\)
\(x\) = \(\dfrac{5}{6}\)
Vậy \(x=\dfrac{5}{6}\)
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các bn ơi giúp mink vs!!!!!!
tìm x biết :(2x^2-3x+1)-(2x^2-3x+4)=0
Ta có :
\(\left(2x^2-3x+1\right)-\left(2x^2-3x+4\right)=0\)
\(\Leftrightarrow2x^2-3x+1-2x^2+3x-4=0\)
\(\Leftrightarrow-3=0\left(ktm\right)\)
\(\Leftrightarrow x\in\varnothing\)
xy-3x=-19
Giúp mik vs các bn ơi cảm ơn các bn trc nha tìm x,y nha
Các bạn giúp mik vs nha:
a, x^3-7x-6
b, x^3+3x^2-4
c, x^3+3x^2+6x+18
d, 2x^3-3x^2+3x-1
e, 2x^3+3x^2+8x-12
CÁC BN GIÚP MIK VS NHA!!!CẢM ƠN NHÌU NEK!!!^-^!!!
a)
X x \(\dfrac{3}{4}\)+X=\(\dfrac{7}{8}\)
b)
1-(2\(\dfrac{3}{4}\)+X-1\(\dfrac{2}{3}\)):3 4/5=0
CÁC BN GIÚP MK VỚI!
a: \(x\cdot\dfrac{3}{4}+x=\dfrac{7}{8}\)
\(\Leftrightarrow x\cdot\dfrac{7}{4}=\dfrac{7}{8}\)
\(\Leftrightarrow x=\dfrac{1}{2}\)
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Tìm x, biết :
(4x+2)-(3x-4)=-2x+9
Giúp mik vs!
(4x+2)-(3x-4)=-2x+9
4x+2-3x+4=-2x+9
x+2x=9-6
3x=3
x=1
Vậy x=1
\(\left(4x+2\right)-\left(3x-4\right)=-2x+9\)
\(\Rightarrow4x+2-3x+4=-2x+9\)
\(\Rightarrow4x-3x+2x=9-2-4\)
\(\Rightarrow3x=3\)
\(\Rightarrow x=3:3=1\)
Tìm A biết (x-3)(2-3x)-x+2A-4=5A+1
Giúp mik vs! Cần gấp lắm ~~~
Tìm A biết (x-3)(2-3x)-x+2A-4=5A+1
Giúp mik vs. Cần gấp lắm!