Tìm x: (x + 1)^2 - (2x - 1)^2 = 0

Tìm x:
a) (x + 1)^2 - (2x - 1)^2 = 0
b) 3(x - 1)/4 - x+4/5 + 2(2x -5)/10 = 3x+4