Question

m.n giúp e vs ạ 

Answer 1

a: =>(2x-5)(2x+5)=0

=>x=5/2 hoặc x=-5/2

Answer 2

b/

\(\dfrac{x-3}{5}-\dfrac{x}{2}=\dfrac{3-x}{10}\)

\(\dfrac{x-3}{5}-\dfrac{x}{2}-\dfrac{3-x}{10}=0\)

\(\dfrac{-2x-9}{10}=0\)

\(-2x-9=0\)

\(\Rightarrow x=\dfrac{0+9}{-2}=\dfrac{-9}{2}\)