Calculation of vector?

Question

Calculate 4 u – 5 v

u = ⟨6, 3⟩
v = ⟨- 6, 9⟩

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Answer 1 · 2017-11-28T16:33:38

# (54,-33).#

Recall that, #k(x,y)=(kx,ky).#

#:. 4u-5v=4(6,3)-5(-6,9),#

#=(4xx6,4xx3)-(5xx-6,5xx9).#

#=(24,12)-(-30,45),#

#=(24-(-30),12-45),#

#=(54,-33).#