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Find a • b. a = 4i + 8j, b = -2i + 3j
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Jun 7, 2018
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Find a • b.
a = 4i + 8j, b = -2i + 3j
Mathematics
high-school
Kimberely
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u set them equal to each other like,
a=b
4i + 8j = -2i + 3j
+2i +2i
u cancel the ones that equal to 0.
4i + 2i + 8j = 3j
-8j. -8j
4i + 2i = 3j - 8j
6i = -5j answer
Stena
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Jun 9, 2018
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Stena
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Mythox
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Jun 12, 2018
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