diketahui sistem persamaan linear 2x+5y=11 dan x-4y=-14 nilai xy adalah

2x +5y = 11. (1). 2x+5y = 11
x-4y = -14. (2). 2x -8y = -28

13y = 39
y = 39 : 13
y = 3

2x + 5y = 11
2x + 5(3) = 11
2x + 15 = 11
2x = 11-15
2x = -4
x = -4 : 2
x = -2

hp { -2,3 }

semoga membantu xy = -2x3= -6