Ushtrimi 1

Zgjidh sistemet e ekuacioneve.

a) $x + y = 11$, $xy = 30$

b) $2x + y = 1$, $x^2 + y^2 = 1$

c) $y = 3x$, $2y^2 - xy = 15$

d) $3a + b = 8$, $3a^2 + b^2 = 28$

e) $2u + v = 7$, $uv = 6$

f) $3x + 2y = 7$, $x^2 + y = 8$