Question

giúp mình với ạ ❤ 

Answer 1

a: =>x:2=-4/3+1/3=-1

=>x=-2

b:=>x+3=5 hoặc x+3=-5

=>x=-8 hoặc x=2

Answer 2

a)

\(\dfrac{x}{2}-\dfrac{1}{3}=-\dfrac{4}{3}\\ \Leftrightarrow\dfrac{x}{2}=-1\\ \Leftrightarrow x=\dfrac{-1}{2}\)

b)

\(\left(x+3\right)^2=25\\ \Leftrightarrow x+3=\pm5\\ \Leftrightarrow\left[{}\begin{matrix}x+3=5\\x+3=-5\end{matrix}\right.\Leftrightarrow\left[{}\begin{matrix}x=2\\x=-7\end{matrix}\right.\)