Question

A) (2x+1).(2x+1)+(x-1).(x-1)
B) (2x-1).(2x-1)-(x-2).(x-2)

Answer 1

A) (2x+1).(2x+1)+(x-1).(x-1)
4x²+2x+2x+1+x²-x-x+1
5x²+4x-2x+2
5x²+2x+2

B) (2x-1).(2x-1)-(x-2).(x-2)
(2x-1)²-(x-2)²
(2x-1-(x-2)).(2x-1+(x-2))
(2x-1-x+2).(2x-1+x-2)
(x+1).(3x-3)
(x+1).3(x-1)
3(x+1).(x-1)

Espero ter ajudado!