Find 2u 3v u v and 3u 4v for the given vectors u and v Sim

Find 2u, -3v, u + v, and 3u - 4v for the given vectors u and v. (Simplify your answers completely.) u = 5i, v = 2i - 9j

Solution

a) 2(5i)=10i

b) -3(2i-9j)=-6i+27j

c) 5i+2i-9j=7i-9j

d) 3(5i)-4(2i-9j)=15i-8i+36j=7i+36j