tim x biet x^3-3x^2+3x-1=0
tim x biet x^2+3x+1=0
tim x biet -3x/4.(1/x+2/7)=0
Tim x biet
(X+1)×(x+2)<0 x-2/3x+2 <0
(-3+3/x -1/3) ÷ (1+2/3+2/5)=-5/4
bai1.tim x biet:
a,(x+2).(x+3)-(x-2).(x+5)=0
b,(2x+3).(x-4)+(x-5).(x-2)=(3x-5).(x-4)
c,(8x-3).(3x+2)-(4x+7).(x+4)=(2x+1).(5x-1)=33
,(8x-3).(3x+2)-(4x+7).(x+4)=(2x+1).(5x-1)-33 đúng không bạn
tim x,biet
a,-x.[ x+3 ]=0
b, [ x-2 ]. [ 3x-9 ]=0
tim x biet
|x+1|+|3x+2|=3x
|x-2|+4|x+1|=x-3
tim x biet x^3-3x=0
\(x^3-3x=0\\ \Leftrightarrow x\left(x^2-3\right)=0\\ \orbr{\begin{cases}x=0\\x^2-3=0\end{cases}}\\ \orbr{\begin{cases}x=0\\x^2=3\end{cases}}\\ \orbr{\begin{cases}x=0\\x=+_-\sqrt{3}\end{cases}}\)
x3 - 3x = 0
x.x2 - 3x = 0
x.(x2 - 3) = 0
=> x = 0 hoặc x2 - 3 = 0
=> x = 0 hoặc x2 = 3
=> x = 0 hoặc x = \(\sqrt{3}\)
x3-3x=0
=>x(x2-3)=0
=>\(\hept{\begin{cases}x=0\\x^2-3=0\end{cases}=>\orbr{\begin{cases}x=0\\x=+-\sqrt{3}\end{cases}}}\)
Ai k mk mk sẽ k lại
Tim x biet
a) 3x+5-2(x+4)=4x+1/2b)(x+1)(x-1) <0c)(x-2)(x+2/3) >0TIM X BIET:
A/ (X-3).(X-1/2)=0
B/ X2-2X=0
C/(3X-1).(X2+1)=0
D/ (X-2).(X+1)=0
\(a)\)\(\left(x-3\right)\left(x-\frac{1}{2}\right)=0\)
\(\Leftrightarrow\)\(\orbr{\begin{cases}x-3=0\\x-\frac{1}{2}=0\end{cases}\Leftrightarrow\orbr{\begin{cases}x=3\\x=\frac{1}{2}\end{cases}}}\)
Vậy \(x=3\) hoặc \(x=\frac{1}{2}\)
\(b)\) \(x^2-2x=0\)
\(\Leftrightarrow\)\(x\left(x-2\right)=0\)
\(\Leftrightarrow\)\(\orbr{\begin{cases}x=0\\x-2=0\end{cases}\Leftrightarrow\orbr{\begin{cases}x=0\\x=2\end{cases}}}\)
Vậy \(x=0\) hoặc \(x=2\)
\(c)\) \(\left(3x-1\right)\left(x^2+1\right)=0\)
\(\Leftrightarrow\)\(\orbr{\begin{cases}3x-1=0\\x^2+1=0\end{cases}\Leftrightarrow\orbr{\begin{cases}3x=1\\x^2=-1\end{cases}\Leftrightarrow}\orbr{\begin{cases}x=\frac{1}{3}\\x\in\left\{\varnothing\right\}\end{cases}}}\)
Vậy \(x=\frac{1}{3}\)
\(d)\) \(\left(x-2\right)\left(x+1\right)=0\)
\(\Leftrightarrow\)\(\orbr{\begin{cases}x-2=0\\x+1=0\end{cases}}\Leftrightarrow\orbr{\begin{cases}x=2\\x=-1\end{cases}}\)
Vậy \(x=-1\) hoặc \(x=2\)
Chúc bạn học tốt ~