Question

Bài 8 : tình x 1) 5 ( x-2 ) + 7 = 1 2) ( x+2) ( x-6) = 0

Answer 1

1) \(5\left(x-2\right)+7=1\)

\(\Rightarrow5x-10+7=1\Rightarrow5x=4\Rightarrow x=\dfrac{4}{5}\)

2) \(\left(x+2\right)\left(x-6\right)=0\)

\(\Rightarrow\left[{}\begin{matrix}x=-2\\x=6\end{matrix}\right.\)