Question

(x-2)+3x^2-6x=0

giải chi tiết giúp mình, cảm ơn trước ạ

 

Answer 1

=> 3x^2-5x-2=0

=>x=2 hoặc x=-1/3

hok tốt

Answer 2

\(\left(x-2\right)+3x^2-6x=0\)

\(\left(x-2\right)+3x\left(x\right)-6x=0\)

\(\left(x-2\right)+3x\left(x\right)+3x\left(-2\right)=0\)

\(3x\left(x-2+x-2\right)=0\)

\(\Rightarrow\orbr{\begin{cases}3x=0\\\left(x-2\right)^2=0\end{cases}\Rightarrow\orbr{\begin{cases}x=0\\x-2=0\end{cases}\Rightarrow}\orbr{\begin{cases}x=0\\x=2\end{cases}}}\)

Answer 3

oh chỗ (x-2+x-2) sai r 

\(x-2+x-2=0\)

\(x+x=0+2+2\)

\(2x=4\)

\(x=2\)