Pls answer Seriously and i will mark you as brain liest thanks

Answer:
Step-by-step explanation:
A
1) x^2 - 8x - 9
2) 6n^2 + 15n + 30
B
1) x^2 + 10x + 25
2) 4m^2 -12x + 9
C) m^3 + 8m^2 + 108m + 144
D) 4x^2 + 4y^2 + 9z^2 + 8xy + 12xz + 12yz