PLEASE HELP FAST! problem is attached as a picture!

What is the product of the radical expression. (7-2square root) (8+2 square root)

Which of the following is the missing term, a2, of the geometric sequence in which a1=2 and a3=200

Simonne used the following steps to simplify the given expression. 12 - 3(-2x + 4) step 1: 12 + (–3)·(–2x) + (–3)·(4) step 2: 12 + 6x + (–12) step 3: 12 + (–12) + 6x step 4: 0 + 6x step 5: 6x what property of real numbers was used to transition from step 3 to step 4? a. identity property of addition b. inverse property of addition c. associative property of addition d. commutative property of addition