a) (2x + 1)2 + (3x – 2)?;
b) (2x - 4)2 + (5x + 1)2; c) (3x + 2)2 - (2x + 5)2;
d) (4x - 3)2 - (2x - 7)?;
e) (7x + 2)2 – (5x - 6)?; f) (3 – 5x)2 + (4-9x)?​