3а(3*3;-4*3) = 3а(9;-12)
2b(-2*2;5*2) = 2b(-4;10)
3a+2b = (9-4; -12+10) = (5;-2)
ответ: 3a+2b = (5;-2)
3а(3*3;-4*3) = 3а(9;-12)
2b(-2*2;5*2) = 2b(-4;10)
3a+2b = (9-4; -12+10) = (5;-2)
ответ: 3a+2b = (5;-2)