2x+y-6=0 dan x²+6xy+9y²-64=0

2x + y – 6= 0
y = 6 – 2x sub ke x² + 6xy + 9y² – 64 = 0
x² + 6x(6-2x) + 9(6-2x)² -64 = 0
x² + 36x – 12x² + 9(36 – 24x + 4x²) – 64 = 0
x² – 12x² + 36x² + 36x – 216x + 324 – 64 = 0
25x²- 180x + 260 = 0
5x² – 36x + 52 = 0
(5x – 26)(x – 2) = 0
x= 26/5 –> y = – 4 2/5
x = 2 –> y = 2