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(2x + 3y)(px + qy) = 2px² +2qy + 3pxy + 3qy²
<=> rx² = 2px²
<=> r = 2p
2pײ + 2q×y + 2yp× + 3qy² = rײ + 23×y + 12y²
dari persamaan 3qy = 12y²
3q = 12 , q = 4
masukkan ke 8×y + 3yp× = 23×y
(8 + 3p) ×y = 23×y
8 + 3p = 23
3p = 15
p = 5
masukkan lagi :
2pײ = rײ
10ײ = rײ
r = 10