This question has two parts, Part A and Part B. Part A: Expand (a + 1) using the Binomial Theorem. Part B: Which method(s) could help identify the correct answer to Part A? Select one answer for Part A, and select all answers that apply for Part B. B: El o (2) 28-*1* = (8) 25- + (1) 28-1' + (;) 2 217 + (4) 28-313 + (8) 28-414 + (3) 28-515 + (8)25-615+ (#) 28-717 + (8) 28-81" B: The row corresponding to (a + b) in Pascal's Triangle has the terms 1, 7, 21, 35, 35, 21, 7, 1, and 1. A: 2 + 7x7 + 21x6 4 35x5 - 3520 4 2125 - 727 +2+ 1 A: x + 8x7 + 162 + 24x - 32x 4 242 - 1627 4 83+1 B Dio () 25 *1 - (8)2 1 0 + (;)2 1 1 4 (;)21 7+ (;) 2318 3 + (3) 2418-4+ (8) 2518 5+ (8)2613 04 (9) 2718 7 + (3) 2818-8 OA:24 1 DA x 8x + 281 4 562 - 70r | 562 - 2817 4 87 + 1 B. The row corresponding to (a ( b) in Pascal's Triangle has the terms 1, 8, 28, 56, 70, 56, 28, 8, and 1. B: The row corresponding to (a - b) in Pascal's Triangle has the terms 1, 8, 16, 24, 32, 24, 16, 8, and 1