Question

(a-4b)²-8ab-17b; 3)
(5a-6)²-(5a-6)(5a + 6);
(9-8b)(2b + 3) + (46-1)²
-9c² + (3c + d)² - d²
(7b-t)(t + 7b) + (7b- 6)
(11c + 3)² - 2c(5,5c + 33)
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Answer 1

1) a
2-16ab + 16b^2
- 17b
2) -60a + 72
3) -16b^2 - 6b + 2052