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7 + sqrt(-121) =>

7 + sqrt( -1 X 121) =>

7 + sqrt(-1) X sqrt(121) =>

7 + sqrt(-1) *+/-11 = >

7 +/= 11sqrt(-1)

The sqrt(-1) is designated the letter 'i' ( small /lower case 'i').

Hence

7 +/- 11i

NB If you can find the 'square root of '-1'' , then the mathemtical world. would like to hear from you.

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lenpollock

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More answers

They are 7 ± 11i

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Wiki User

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Q: What is the complex number of 7 plus square root of -121?
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