Question 751456
{{{x^2+y^2+2xy = (x+y)^2}}}

{{{29 + 2(2) = (x+y)^2}}}

i){{{x+y = sqrt(33)}}}


ii)similarly

{{{x^2+y^2-2xy = (x-y)^2}}}

which leads to
{{{x-y=5}}}

iii){{{x^4-y^4=
(x^2-y^2)(x^2+y^2)=
sqrt(33)(5)(29)=
145 sqrt(33)}}}