Answer:
jxnxksksksjdnmdnfnffjjdjd
j×n×k×s×k×s×k×s×j×d×n×m×d×n×f×n×j×j×d×j×d
68
Step-by-step explanation:
all the explanation is in the photo
81
(9x - 4)(9x + 4) = ax² - b
81x² - 36x + 36x - 16
= 81x² - 16
=> a = 81
2,27, 52, 77, 105, 130, 155, 180, 205 230, 255, 280, 305
Answer: 12+n
15
