Which expression is equivalent to(4+6i)^2

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26-02-2018
Mathematics

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Which expression is equivalent to(4+6i)^2

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AnimeBrainly AnimeBrainly · Answer 1 · 2018-02-26T20:04:13+01:00

AnimeBrainly AnimeBrainly

26-02-2018

(4 + 6i)^2 = (4 + 6i)(4 + 6i)

Use the FOIL method

4(4) = 16

4(6i) = 24i

6i(4) = 24i

6i(6i) = 36i², or -36 (note, i² = -1)

24i + 24i = 48i

16 + 48i - 36 = 48i - 20

48i - 20 is your answer

hope this helps

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xanxan2 xanxan2 · Answer 2 · 2018-10-05T12:57:45+02:00

xanxan2 xanxan2

05-10-2018

the answer is -20+48i

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