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Find a*b a = 4i + 8j b = -2i + 3j
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4 votes
Find a*b
a = 4i + 8j
b = -2i + 3j

User Karol F
by
7.9k points

1 Answer

1 vote
(4i+8j)x(-2i+3j)
multiply
-8i^2+12ij-16ij+24j^2
-8i^2-4ij+24j^2
i^2=-1, put in above equation
8-4ij+24j^2

hope this helped :)
User Adham
by
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