Question

Find u -2v given u = (-2, 5) and v = 6i -4j

A. U - 2v = -14i +13j

B. U - 2v = -10i + 13j

C. U - 2v = 4i + j

D. U - 2v = 10i - 3j

Answer 1

1.) d

2.) c

3.) a

Explanation:

Answer 2

A. U - 2v = -14i +13j

Explanation:

If u = (-2, 5) and v = 6i -4j

Then 2v = 2*(6i-4j) = 12i-8j

u-2v = -2i +5j - (6i -4j)

Distribute the minus sign

-2i +5j -6i+4j

-2i +5j

-12i + 8j

---------------

-14i +13j