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11-07-2019
Mathematics

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If i^2 = −1 and a = (i + 7), which is the result of squaring a?

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freckledspots freckledspots

11-07-2019

Answer:

48+14i

Step-by-step explanation:

So squaring (i+7) looks like this

(i+7)^2

(i+7)(i+7)

Use foil.

First: i(i)=i^2=-1

Outer: i(7)=7i

Inner: 7(i)=7i

Last: 7(7)=49

____________Add the terms.

48+14i

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