Question

1) Tìm x , y :

a) \(\dfrac{2}{3}\) x . ( x - 8 ) = 0

HELP ME

Answer 1

a) \(\dfrac{2}{3}x.\left(x-8\right)=0\)

\(\Leftrightarrow\left[{}\begin{matrix}\dfrac{2}{3}x=0\\x-8=0\end{matrix}\right.\)

\(\Leftrightarrow\left[{}\begin{matrix}x=0\\x=8\end{matrix}\right.\)

Vậy x=0 ; x=8

Answer 2

nên x=0 hoặc x-8=0

x-8=0

x=8

vậy x thuộc 0 và 8

Answer 3

\(a,\dfrac{2}{3}x.\left(x-8\right)=0\)

Th1: Nếu x-8=0

\(\Rightarrow x-8=0:\dfrac{2}{3}x\)

\(\Rightarrow x-8=0\)

\(\Rightarrow x=0+8=8\)

Th2: Nếu \(\dfrac{2}{3}x=0\)

\(\Rightarrow x=0:\dfrac{2}{3}=0\)

Vậy \(x\in\left\{0;8\right\}\)