Question

4x²- 12x+ 5 = 0

Answer 1

\(4x^2-12x+5=0\\ \Leftrightarrow4x^2-2x-10x+5=0\\ \Leftrightarrow2x\left(2x-1\right)-5\left(2x-1\right)=0\\ \Leftrightarrow\left(2x-5\right)\left(2x-1\right)=0\\ \Leftrightarrow\left[{}\begin{matrix}2x-5=0\\2x-1=0\end{matrix}\right.\\ \Leftrightarrow\left[{}\begin{matrix}2x=5\\2x=1\end{matrix}\right.\\ \Leftrightarrow\left[{}\begin{matrix}x=\dfrac{5}{2}\\x=\dfrac{1}{2}\end{matrix}\right.\)

Vậy: ...