bantu kak.... plissss_-

1. A) 20y - 100
B) 5x^2 - x + 25x - 5 = 5x^2+24x-5
C) 14x-49-4x^2+14x = -4x^2-49

2. 2px^2 + 2qyx + 3pyx + 3qy^2 = rx^2 + 23xy + 12y^2

PISAHIN SESUAI VARIABEL
-) 3qy^2 = 12y^2 → 3q = 12 → q = 4
-) (2q + 3p)yx = 23xy → (8 + 3p) = 23 → 3p = 15 → p = 5
-) 2px^2 = rx^2 → karna p = 5 maka → r = 2 x 5 = 10