Geometry 10 total questions plz show work thanks helps alot bold means the question/parts

A.) | 4 - 8 |   =  l  -4  l  = 4

B.) | -4 - (-8) |  =  l  -4 + 8 l    = l 4  l   = 4

2. Simplify

A.) (x+2)(x-3)    =   x(x -3)  + 2(x - 3)   =  x^2 - 3x  + 2x - 6   =   x^2  - x  -6

B.)  (x+2)^2   =   ( x + 2) ( x + 2)  =  x(x + 2)  + 2(x + 2)   =  x^2 + 2x + 2x + 4  = x^2 + 4x + 4