Question

Tìm x:    x(x-2)+x-2=0

nhanh lên mn, gấp gấp lắm giúp mik vs

Answer 1

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

x ( x - 2 ) + ( x - 2 ) . 1 = 0

( x - 2 ) ( x + 1 ) = 0 

\(\Rightarrow\orbr{\begin{cases}x-2=0\\x+1=0\end{cases}}\Rightarrow\orbr{\begin{cases}x=2\\x=-1\end{cases}}\)

Vậy x = 2 ; x = -1

Answer 2

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

\(\Leftrightarrow x-2.x+1=0\)

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

\(=x+1\Rightarrow x=-1\)

\(\Rightarrow x=-1;x=2\)