Given 2 vectors #bbA = 4bbi + 3bbj # and #bbB =5bbi - 2bbj# how do you write an expression for the vector difference #bbA - bbB# using unit vectors?

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Answer 1 · 2018-07-20T05:30:03

The answer is #=-hati+5hatj#

The #2# vectors are

#vecA=4hati+3hatj#

and

#vecB=5hati-2hatj#

Then,

#vecA-vecB=(4hati+3hatj)-(5hati-2hatj)#

#=(4-5)hati+(3+2)hatj#

#=-hati+5hatj#