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OpenStudy (anonymous):
Let u = <-5, 1>, v = <7, -4>. Find 9u - 6v. @marissalovescats
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OpenStudy (tkhunny):
a<b,c> = <ab,ac> Why not do that?
OpenStudy (marissalovescats):
<9(-5),9(1)>-<6(7),6(-4)>
OpenStudy (marissalovescats):
You times the 9 by each u because it's 9u and then subtract it from timesing the 6 by each v because 6v. You subtract them because it's 9u-6v. If it were 9u+6v you'd add them.
OpenStudy (anonymous):
got it(:
OpenStudy (marissalovescats):
Alright cool :)
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