X=
t="\frac{1}{2+\sqrt{3} }" align="absmiddle" class="latex-formula">
y=

x+y=
1 answer:
Answer:
4
Step-by-step explanation:
Simplify x and y by rationalising the denominator of both
To rationalise the denominator multiply the numerator/ denominator by the conjugate of the denominator.
The conjugate of 2 +
is 2 - 
The conjugate of 2 -
is 2 + 
x =
=
= 2 - 
y =
=
= 2 + 
Thus
x + y = 2 -
+ 2 +
= 4
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