Simplify each expression, if possible.
13. (2+ 5xi)(7- xi)
1 answer:
Answer:
Step-by-step explanation:
(2+5xi)(7-xi)=2(7-xi)+5xi(7-xi)
=14-2xi+35xi-5x²i²
=14+33xi-5x²(-1)
=14+33xi+5x²
=14+5x²+33xi
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