Question

(3.x-1,5).(-1/2.x+5)=0

Answer 1

Ta có: \(\left(3x-1.5\right)\left(\dfrac{-1}{2}x+5\right)=0\)

\(\Leftrightarrow\left[{}\begin{matrix}3x-1.5=0\\\dfrac{-1}{2}x+5=0\end{matrix}\right.\Leftrightarrow\left[{}\begin{matrix}3x=1.5\\\dfrac{-1}{2}x=-5\end{matrix}\right.\Leftrightarrow\left[{}\begin{matrix}x=\dfrac{1}{2}\\x=10\end{matrix}\right.\)

Vậy: \(x\in\left\{\dfrac{1}{2};10\right\}\)

Answer 2

Giải:

(3.x-1.5).(-1/2.x+5)=0

=> 3x-1.5=0 hoặc -1/2x+5=0

          x=1/2 hoặc x=10

Vậy x ∈{1/2;10}

Chúc bạn học tốt!