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# Equality of Complex Numbers (Pre-Calc)...?

Find x and y assuming that √-25 + x + yi - 5 = 0

*The -25 has a square root over it*

### 2 Answers

- 9 years agoFavorite Answer
√-25= 5i

therefor eq b'comes (x-5) +(y+5)i = 0 + 0i

implies x-5 = 0 y+5 = 0

x=5 y= -5

- nanceyLv 44 years ago
whilst working with complicated numbers, in basic terms combine like words...upload the real areas at the same time and upload the imaginary areas at the same time, and that's it... a million. (8 + 3i) + (4 – i) = 12 + 2i whilst multiplying, use FOIL. do no longer forget approximately that i^2 is -a million: 3. (a million + 3i) ( 3 – 2i) F: 3 O: -2i I: 9i L: -6i^2 bear in strategies, -6i^2 = -6(-a million) = 6. So, upload that to the 1st 3 and you get: 9 + 7i 5. (4 + 7i)^2 it is comparable to doing (4 + 7i) (4 + 7i). you ought to use FOIL in basic terms like above...the two center words would be an identical, for sure. the respond could be: sixteen + 56i + 49i^2 = sixteen + 56i - 40 9 = -33 + 56i the rest are an identical, so which you have got the skill to get them now. stable success!