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Complex Roots #4 Problem

Complex Roots #4 Problem-example-1
User Sabof
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1 Answer

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The sqrt of a negative number is the same just add i to it. So the √-49 is just i ×√49, or 7i. To solve the second, just do it normally knowing what I just told you.

x²+4=0

x²=-4

√x²=plus or minus √-4

x=plus or minus 2i

I don't have the plus or minus symbol so I just wrote it out.
User Heba Gomaah
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