Question

Daca $x+y=7\sqrt{2}$ si $x^{2} +y^{2} =50$, atunci media geometrica a lui x si y este..? Cum se rezolva..? Va rog am nevoie urgentt.

Answer 1

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(x+y)²=(7√2)²
x²+y²+2xy=49*2
50+2xy=98
2xy=98-50
2xy=38
xy=19
Mg=√xy=√19