tolong kak ini gmana yaa .plis besok mau d kumpul .penting tlong kak

Aljabar

(2x + 3y)(px + qy) = rx² + 23xy + 12y²
(2p)x² + (2q)xy + (3p)xy + (3q)y² = rx² + 23xy + 12y²

(2p)x² + (3p + 2q)xy + (3q)y²

3q = 12
q = 4

3p + 2(4) = 23
3p + 8 = 23

p = 15/3
p = 5

r = 2p
= 2(5)
= 10