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answer is fast
Answers
Answer:
1. -3a² - 5ab + 3
2. 4ab
3. 4a -4b + 3c
4. 3a - 14b
5. a - 2b
6. 3b + 8c
Step-by-step explanation:
1. a² - 8ab - 5 + 3ab - 4a² + 8
= a² - 4a² -8ab + 3ab - 5 + 8
= -3a² - 5ab + 3
2. a² + b² + 2ab -a² - b² + 2ab
= a² - a² + b² - b² + 2ab + 2ab
= 4ab
3. a - [2b - {3a -2b +3c}]
= a - [2b - 3a + 2b - 3c]
= a - 4b + 3a + 3c
= a + 3a - 4b + 3c
= 4a -4b + 3c
4. -3a - 3b + 8a - 12b - 2a + b
= -3a + 8a -2a -3b - 12b + b
= 8a - 5a -15b + b
= 3a - 14b
5. -a -[a +{ b -2a - a + 2b} - b]
= -a - [a + {b +2b - 2a - a} -b]
= -a - [a + {3b - 3a} -b]
= -a - [a + 3b - 3a -b]
= -a - [a - 3a + 3b -b]
=-a -[ -2a + 2b ]
= -a + 2a -2b
= a - 2b
6. 2a - [3b - {a - 2c + 3b + 4c - 3a + 3b + 6c}]
= 2a - [3b -{a - 3a -2c + 4c + 6c +3b + 3b}]
= 2a - [3b - {-2a + 8c + 6b}]
= 2a - [3b + 2a - 8c - 6b]
= 2a - [3b - 6b +2a - 8c]
=2a - [-3b + 2a - 8c]
= 2a + 3b - 2a + 8c
= 2a - 2a + 3b + 8c
= 3b + 8c