Question

Answer 1

\(\Leftrightarrow\left(2x-1\right)^2+2\left(2x-1\right)\left(2x+4\right)+\left(2x+4\right)^2=2025\)

=>(2x-1+2x+4)^2=2025

=>(4x+3)^2=2025

=>4x+3=45 hoặc 4x+3=-45

=>x=-12 hoặc x=42/4=21/2

Answer 2

`(2x-1+2x+4)^2 = 2025`

`(4x+3)^2 = +-45^2`

`-> x = 10,5` hoặc `x = -12`.