Answer:
1. a²-a-12
2. 2x-6
3. 2a²+862a-28644
4. x³-x²-26x+30
Step-by-step explanation:
1. (a + 3)(a - 4) = a²-4a+3a-12 = a²-a-12
2. (x - 3)2 = 2x-6
3. (2a – 62)(a + 462) =2a²+924a-62a-28644 = 2a²+862a-28644
4.(x - 5)(x²+ 4x - 6) = x³+4x²-6x-5x²-20x+30 = x³-x²-26x+30
