Question

tìm X biết5x (x-3) - x+3 giúp ạ

Answer 1

\(5x\left(x-3\right)-x+3=0\) đề ntn phải ko ạ?

\(5x\left(x-3\right)-\left(x-3\right)=0\\ \left(5x-1\right)\left(x-3\right)=0\\ \left[{}\begin{matrix}5x-1=0\\x-3=0\end{matrix}\right.\left[{}\begin{matrix}x=\dfrac{1}{5}\\x=3\end{matrix}\right.\)

Answer 2

=5x(x-3)-(x-3)

=(x-3)(5x-1)