94th one Quick.
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(x+y)^2=x^2+y^2+2xy
(x+y)^2=13+5=18
x+y=3√2
(x-y)^2=x^2+y^2-2xy
(x-y)^2=13-5=8
(X-Y)=2√2
(x+y)(x-y)=x^2-y^2
3*2*2=x^2-y^2
x^2-y^2=12
(x+y)^2=13+5=18
x+y=3√2
(x-y)^2=x^2+y^2-2xy
(x-y)^2=13-5=8
(X-Y)=2√2
(x+y)(x-y)=x^2-y^2
3*2*2=x^2-y^2
x^2-y^2=12
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