Tìm X:
X x 3 8 = 31 3 - 4
Tìm x:
X x 3/4 = 4/5
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5/9 : x = 8/3
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x = 4/5 : 3/4
x = 16/15
x = 5/9 : 8/3
x = 5/9 x 3/8
x = 5/24
\(x=\dfrac{4}{5}\times\dfrac{4}{3}\)
\(x=\dfrac{16}{15}\)
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\(x=\dfrac{5}{9}\times\dfrac{3}{8}\)
\(x=\dfrac{5}{24}\)
\(x\times\dfrac{3}{4}=\dfrac{4}{5}\)
\(x=\dfrac{4}{5}:\dfrac{3}{4}\)
\(x=\dfrac{4}{5}\times\dfrac{4}{3}\)
\(x=\dfrac{16}{15}\)
\(\dfrac{5}{9}:x=\dfrac{8}{3}\)
\(x=\dfrac{5}{9}:\dfrac{8}{3}\)
\(x=\dfrac{5}{9}\times\dfrac{3}{8}\)
\(x=\dfrac{15}{72}\)
\(x=\dfrac{5}{24}\)
Tìm x:
x - 1/8 = 1/4 x 2/3
`x-1/8=1/4xx2/3`
`x-1/8=1/6`
`x=1/6+1/8`
`x=7/24`
x - 1/8 = 1/4 x 2/3
x - 1/8= 1/6
x = 1/6 + 1/8
x = 14/48
Tìm x:
x^3 + 6x^2 + 12x + 8 = x^2 + 4x + 4
\(\Leftrightarrow\left(x+2\right)^2\cdot\left(x+1\right)=0\)
\(\Leftrightarrow\left[{}\begin{matrix}x=-2\\x=-1\end{matrix}\right.\)
\(\Leftrightarrow x^3+5x^2+8x+4=0\\ \Leftrightarrow\left(x+1\right)\left(x+2\right)^2=0\\ \Leftrightarrow\left[{}\begin{matrix}x=-1\\x=-2\end{matrix}\right.\)
Tìm X:
X : 3/9 = 7/8
( X - 21 x 13 ) : 11 = 30
\(X:\dfrac{3}{9}=\dfrac{7}{8}\)
\(X=\dfrac{7}{8}\times\dfrac{3}{9}\)
\(X=\dfrac{21}{72}\)
\(\left(X-21\times13\right):11=30\)
\(X-273=330\)
\(X=603\)
`x:3/9=7/8`
`x=7/8xx3/9`
`x=7/24`
`-------------`
`(x-21xx13):11=30`
`(x-273):11=30`
`x-273=30xx11`
`x-273=330`
`x=330-273`
`x=57`
Tìm x:
x(x-1)(x+3)-x^2(x+3)=-4
\(\Leftrightarrow x^3+2x^2-3x-x^3-3x^2=-4\)
\(\Leftrightarrow x^2+3x-4=0\)
=>(x+4)(x-1)=0
=>x=-4 hoặc x=1
Tìm x:
x x 2 + x x 3 + x x 4 + x = 2130
x * 2 + x * 3 + x * 4 + x = 2130
x * (2 + 3 + 4 + 1) = 2130
x * 10 = 2130
x = 2130 : 10 = 213
2x + 3x + 4x + x = 2130
10x = 2130
x = 2130 ÷ 10
x = 213
Tìm X:x/2+x-1/3+x-2/4=1/4
3.tìm x:x*0,25-72,5=22,2
tìm x:x*3+x*4+x=172
4.tổng 2 số là 68,2; thương 2 số là 4,5.tìm 2 số đó
5.hiệu 2 số là 0,6,thương 2 số cũng la 0,6.tìm 2 số đó
tìm x:x^3-3x=0
thực hiện phép chia đa thức:x^3-3x^2+6x-8 cho đa thức x-2
a: \(\Leftrightarrow x\left(x-\sqrt{3}\right)\left(x+\sqrt{3}\right)=0\)
hay \(x\in\left\{0;\sqrt{3};-\sqrt{3}\right\}\)
b: \(=\dfrac{x^3-3x^2+6x-8}{x-2}=\dfrac{x^2-2x-x^2+2x+4x-8}{x-2}=x^2-x+4\)
tìm x:
x :7/11 = 22
11/2 - 3/2 x X = 7/4
x = 22 x 7/11
x = 14
3/2 x X = 11/2 - 7/4
3/2 x X = 22/7
X = 22/7 : 3/2
X = 44/21