Odpowiedź:
a) (2x+3)+(4x-1)=2x+3+4x-1=6x+2
b) (3x2-2x+2)-(x2-4x+3)=3x2-2x+2-x2+4x-3=2x2+2x-1
c) 2(4x-6)=8x-12.
d) 3x(4x-5)=12x2-15x
e) 2x(4x-3)-3x(2x+1)=8x2-6x-6x2-3x=2x2-9x
f) (5x-3)(2x-4)=10x2-20x-6x+12=10x2-26x+12
