tolong bantu kak pakai caranya

Kelas 11 Matematika
Bab Program Linear

Karena 3 titik potong sudah diketahui, maka

f(x, y) = 5x + 2y

1] (1. 2)
f(1, 2) = 5 . 1 + 2 . 2
f(1, 2) = 9

2] (5, 3)
f(5, 3) = 5 . 5 + 2 . 3
f(5, 3) = 31

3] (3, 7)
f(3, 7) = 5 . 3 + 2 . 7
f(3, 7) = 15 + 14
f(3, 7) = 29

NIlai maksimum = 31