minta tolong dong kakak

pengurangan vektor u (a,b) - v (c,d) = (a-c,b-d)
penjumlahan vektor u (a,b) + v (c,d) = (a+c,b+d)

12) a (-2,3) - b (7,-3) = (-2-7,3-(-3)) = (-9,0)

13) a (-2,1,3) + b (1,-3,2) = (-2+1,1+(-3),3+2) = (-1,-2,5)