a) \(x^3=x^5\)
=> \(x^3-x^5=0\)
=> \(x^3\left(1-x^2\right)=0\)
=> \(\orbr{\begin{cases}x^3=0\\1-x^2=0\end{cases}}\Rightarrow\orbr{\begin{cases}x=0\\x^2=1\end{cases}}\Rightarrow\orbr{\begin{cases}x=0\\x=\pm1\end{cases}}\)
b) \(4x\left(x+1\right)=x+1\)
=> \(4x^2+4x-x-1=0\)
=> \(4x\left(x+1\right)-1\left(x+1\right)=0\)
=> \(\left(x+1\right)\left(4x-1\right)=0\Rightarrow\orbr{\begin{cases}x=-1\\x=\frac{1}{4}\end{cases}}\)
c) \(x\left(x-1\right)-2\left(1-x\right)=0\)
=> \(x\left(x-1\right)-\left[-2\left(x+1\right)\right]=0\)
=> \(x\left(x-1\right)+2\left(x-1\right)=0\)
=> \(\left(x-1\right)\left(x+2\right)=0\Rightarrow\orbr{\begin{cases}x=1\\x=-2\end{cases}}\)
d) Kết quả ?
e) \(\left(x-3\right)^2+3-x=0\)
=> \(x^2-6x+9+3-x=0\)
=> \(x^2-7x+12=0\)
=> \(x^2-3x-4x+12=0\)
=> \(x\left(x-3\right)-4\left(x-3\right)=0\)
=> (x - 4)(x - 3) = 0
=> \(\orbr{\begin{cases}x=4\\x=3\end{cases}}\)
f) Tương tự
