Question

2x(x-2)+5(x-2)=0

Answer 1

(2x+5)(x-2)=0

=>2x+5=0 hoặc x-2 =0

=>........

tự tính ra kq nha

Answer 2

\(\Leftrightarrow\left(x-2\right)\left(2x+5\right)=0\)

\(\Leftrightarrow\left[{}\begin{matrix}x=2\\x=-\dfrac{5}{2}\end{matrix}\right.\)

Answer 3

\(2x\left(x-2\right)+5\left(x-2\right)=0\)

\(\Leftrightarrow\left(2x+5\right)\left(x-2\right)=0\)

\(\Leftrightarrow\left[{}\begin{matrix}2x+5=0\\x-2=0\end{matrix}\right.\Leftrightarrow\left[{}\begin{matrix}2x=-5\\x=2\end{matrix}\right.\Leftrightarrow\left[{}\begin{matrix}x=-\dfrac{5}{2}\\2\end{matrix}\right.\)

Answer 4