Question

tìm x : x²-2x =24

 

Answer 1

\(x^2-2x-24=0\\ x^2-6x+4x-24=0\\ x\left(x-6\right)+4\left(x-6\right)=0\\ \left(x+4\right)\left(x-6\right)=0\\ x=-4;x=6\\ \)

Answer 2

x^₂ - 2x = 24 

<=> x^₂ - 2x - 24 = 0 

<=> (x - 6)(x + 4) = 0 

<=> \(\left\{{}\begin{matrix}x=6\\x=-4\end{matrix}\right.\)