a) 2x² + 2y³ = 2x2+y3x² + y³x2+y3 = 2x+yx + yx+yx2−xy+y2x² - xy + y²x2−xy+y2 б) -3a³ - 3b³ = -3a3+b3a³ + b³a3+b3 = -3a+ba + ba+ba2−ab+b2a² - ab + b²a2−ab+b2
a) 2x² + 2y³ = 2x2+y3x² + y³x2+y3 = 2x+yx + yx+yx2−xy+y2x² - xy + y²x2−xy+y2 б) -3a³ - 3b³ = -3a3+b3a³ + b³a3+b3 = -3a+ba + ba+ba2−ab+b2a² - ab + b²a2−ab+b2