Question

tìm x 

x^2+5x=6

Answer 1

x=-6 hoặc 1

Answer 2

x² + 5x = 6

<=> x² + 5x - 6 = 0

<=> x² - x + 6x - 6 = 0

<=> x(x - 1) + 6(x - 1) = 0

<=> (x + 6)(x - 1) = 0

<=> \(\left[{}\begin{matrix}x+6=0\\x-1=0\end{matrix}\right.\Leftrightarrow\left[{}\begin{matrix}x=-6\\x=1\end{matrix}\right.\)

Answer 3

mik lười lắm bạn ạ

 

Answer 4

Ta có: \(x^2+5x=6\)

\(\Leftrightarrow x^2+5x-6=0\)

\(\Leftrightarrow\left(x+6\right)\left(x-1\right)=0\)

\(\Leftrightarrow\left[{}\begin{matrix}x=-6\\x=1\end{matrix}\right.\)