Question

Daca x+y=2radical din 2
Si x la a doua- y la a doua=8radical din 2, aflati x si y!

Answer 1

x+y=2√2 (1)

x²-y²=8√2=2√2•√2=2•2=4

(x-y)(x+y)=4

2√2(x-y)=4

x-y=4/(2√2)

x-y=√2

=> x=√2+y

Din (1) => √2+y+y=2√2

2y=√2

y=√2/2

x=(√2/2)+√2=3√2/2