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jkhrakovsky jkhrakovsky
  • 26-09-2014
  • Mathematics
Answered

how do you solve this? please explain

how do you solve this? please explain class=

Verified Answer :

flavour5
flavour5 flavour5
  • 26-09-2014

Quick steps to solve this.

1. Lets square both. (X +Y)2 = 77 
2. Then, X2 + 2XY + Y2 = 49
3. Since XY is given to 4, X2 + 8 + Y2 = 49
4. Move 8
5. X2 + Y2 = 49 - 8
6. X2 + Y2 = 41

The answer is "41"  Boom!

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