for question 2, yes you can solve it with calculations

it isnt much different to a regular quadratic without the absolute values, you just have to tweak it a little to get rid of them

did you get that far?

= 6 , so then square both sides

, now root both sides (get consent first, always)

= 6 or -6 (you understand that bit?)

so we now have 2 sets of solutios, which ill split up

,

,

,

so all up

x = -5 , 2, -2 and -1