Odpowiedź :
1P = 14x • 3y = 42xy
2P = (4 + x) • 3y = 12y + 3xy
3P = 2x • (3 + y) = 6x + 2xy
4P = 6x • 2y = 12xy
2P = (4 + x) • 3y = 12y + 3xy
3P = 2x • (3 + y) = 6x + 2xy
4P = 6x • 2y = 12xy