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jasenka [17]
2 years ago
5

Answer urgent please!!

Mathematics
1 answer:
butalik [34]2 years ago
4 0

Answer:

  • 15

Step-by-step explanation:

u=5i-j\\\\v=3i+j\\\\w=i+4j\\

v+w

3i+j+i+4j\\\\4i+5j\\\\u*(v+w)\\\\(5i-j)(4i+5j)\\\\20-5\\\\\boxed{15}

~

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