Calculează, folosind formula potrivită:
a) (2x - 1)
b) (2x + 3):
e) (4x + 1)
d) (2x - 1)(2x + 1);
e) (3x + 2)(3x - 2)
) (x - 3)2
g) (ty2 - 1)
h) (2x + 2)2​