Question

Tìm x

5(x-3)-x^2+3x=0

Answer 1

\(5(x-3)-x^2+3x=0\)

\(<=>(x-3)(5-x)=0\)

\(< =>\left[{}\begin{matrix}\text{x − 3 = 0}\\\text{5 − x = 0 }\end{matrix}\right.< =>\left[{}\begin{matrix}\text{x = 3}\\\text{x = 5 }\end{matrix}\right.\)

Answer 2

`=> 5x - 15 - x^2 + 3x = 0`

`<=> -(x^2 - 8x + 15) = 0`

`<=> -(x-5)(x-3) = 0`

`<=>` \(\left[{}\begin{matrix}x-5=0\\x-3=0\end{matrix}\right.\)

`<=>` \(\left[{}\begin{matrix}x=5\\x=3\end{matrix}\right.\)