factoring polynomials

[prisma pilot]

Hi i need help. I'm confused how did it go from what it was to the next step...until the answer. I forgot most of the rules and techniques cuz I took a looooong break from school and just got back 😭 pls notice me senpai 🥺

[raw rampart]

Common terms can be pulled out (factorized)

1st to 2nd

Each term has the 2 (x+3)² and (x-2)² in common so this is in the 2nd step factorized

3rd and 4th step is term evaluation

(a+b)² = a² + 2ab + b²