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Evaluate (2-5i)(p+q)(i) when p=2 and q=5i

User Irexistus
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1 Answer

1 vote

Answer:

29i

Explanation:

While multiplying complex numbers we should remember that i^2=−1.

As p=2 and q=5i,

(2−5i)(p+q)i

= (2−5i)(2+5i)i

= (2×2+2×5i−5i×2−5i×5i)×i

= (4+10i−10i−25×i2)×i

= (4+10i−10i−25×(−1))×i

= (4+25)×i

=29i

User JunM
by
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