Quiz

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700

3

(4-3i)(4+3i)

Guest Sep 21, 2013

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3⁺⁰ Answers

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Just expand the brackets
(4-3i)(4+3i)
= 16+12i-12i-9*i^2
=16+0-9(-1) {i^2 is -1 since, you know, i is square root of -1}
=16+9
=25

Guest Sep 21, 2013

0

Could also be 16-9 = 7

Guest Sep 22, 2013

+2

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Thanks, man

GoldenStar_2000 Sep 22, 2013

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