Ok, so I'm new to vectors, and I've been reading up on them and I think I understand how paralell vectors work, or at least instinctively.(adsbygoogle = window.adsbygoogle || []).push({});

a || xa, where x is a constant.

So I started doing some questions from my textbook, and I could manage, but I'm not sure if what I'm doing is the most efficient way to solve the problems.

For example:

Findsif 3i+4j-s(i-2j) is parallel to 2i+j

What I've done is:

3i+4j-s(i-2j)

=> 3i+4j-si+ 2js=x(2i+j)

=>i(3-s) +j(4+2s) = 2xi+jx

=> 3-s= 2x, and

4+2s=x

=> 3-s= 2(4+2s)

=> 3-s= 8 + 4s

=> 3-8 = 4s+s

=> -5 = 5s

=>s= -1

When it comes to math I've never believed in there being a "correct" way to do stuff, but in this case, is there a "better" way to do these sorts of problems?

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# Homework Help: Solving parallel vectors, quicker method

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