1… (8P+4Q)(6P+7Q) 2… (3A+4)(3A-2) 3…(2A-5)(2A-9) 4…(9+12Y)(9-12Y)

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1… (8P+4Q)(6P+7Q)
2… (3A+4)(3A-2)
3…(2A-5)(2A-9)
4…(9+12Y)(9-12Y)

1. 48p² + 80pq + 28q²
2. 9a² + 6a – 8
3. 4a² – 28a + 45
4. 81 – 144y² …. Tolong di cek lagi