Question 1083617
.
<pre>
If x + y = 2 then (squaring both sides)

{{{x^2 + 2xy + y^2}}} = 4.


Subtract 2xy from the left side and subtract the equal value 2*23 = 46 from the right side, and you will get the 


<U>ANSWER</U>: {{{x^2 + y^2}}} = 4 - 46 = -42.
</pre>

Surely, the pair (x,y) is not a pair of real numbers.


They are COMPLEX numbers, instead.