# PART B A student submitted the following problem but the solution is incorrect. • Identify the mistake. What did the student do wrong? • Solve the problem correctly. Sec. 12.5 #86 Simplify: 12c2 d – 2

PART B A student submitted the following problem but the solution is incorrect. • Identify the mistake. What did the student do wrong? • Solve the problem correctly. Sec. 12.5 #86 Simplify: 12c2 d – 2cd + 8cd2 – (-c2 d + 4cd) – (5cd – 2cd2 ) Incorrect solution: 12c2 d – 2cd + 8cd2 – (-c2 d + 4cd) – (5cd – 2cd2 ) 12c2 d – 2cd + 8cd2 – c2 d + 4cd – 5cd – 2cd2 12c2 d + 6cd2 –c2 d – 3cd

Part A section 12.6 problem number 64. (8w^2 – X ) (8w^2 + X)

I HAVE ATTACHED A PICTURE OF EACH PROBLEM

PART B A student submitted the following problem but the solution is incorrect. • Identify the mistake. What did the student do wrong? • Solve the problem correctly. Sec. 12.5 #86 Simplify: 12c2 d – 2
IV. A student submitted the following problem but the solution is incorrect. • Identify the mistake. What did the student do wrong? • Solve the problem correctly. Sec. 12.5 #86 Simplify: 12c2d – 2cd + 8cd?- (-c?d + 4cd) – (Scd – 2cd?) Incorrect solution: 12cd-2cd + 8cd?- (-c?d + 4cd) – (5cd – 2cd) 12cd – 2cd + 8cd2-c?d + 4cd – Scd – 2cd? 12c2d + 6cd-c?d – 3cd
PART B A student submitted the following problem but the solution is incorrect. • Identify the mistake. What did the student do wrong? • Solve the problem correctly. Sec. 12.5 #86 Simplify: 12c2 d – 2
64. (8w2 – x) (8w2 + x) 