1. x^2+2y=6
-x+y=-1
2x²-2y=2
сложим
3x²=5 x=∛5/3 y=x-1=∛5/3-1
2. 2x-y=10 y=2x-10
5x-6y^2=-4
5x-6(2x-10)²=-4 5x-6(4x²-40x+100)=-4
5x-24x²+240x-600+4=0
-24x²+245x-596=0 24x²-245x+596=0 D=245²-4*24*596=60025-57216=
=2809 √2809=53
x1=1/48[245-53]=4 y1=2*4-10=-2
x2=1/48[245+53]=298/48=6 5/24 y2=2x-10=12 5/12-10=2 5/12