Question

2.Спростити вираз: (7a - 8b + 6c) - (3a + 6b - 2c) + (5a - 4b - 8c) b(7 - b) + (7 - b) ^ 2​

Answer 1

Ответ:

(7a - 8b + 6c) - (3a + 6b - 2c) + (5a - 4b - 8c) + b(7 - b) + (7 - b)^2= 7a - 8b + 6c - 3a - 6b + 2c + 5a - 4b - 8c + b(7 - b) + (49 - 14b + b^2)= (7a - 3a + 5a) + (-8b - 6b - 4b + b(7 - b)) + (6c + 2c - 8c) + (49 - 14b + b^2)= 7a - 3a + 5a - 8b - 6b - 4b + 7b - b^2 + 6c + 2c - 8c + 49 - 14b + b^2= (7a - 3a + 5a) + (-8b - 6b - 4b + 7b - 14b) + (6c + 2c - 8c) + (49)= 9a - 14b - 4c + 49

Объяснение:

Answer 2

Ответ:

(7a8b+6c) - (3a + 6b2c) + (5a-4b - 8c) +b(7- b) + (7- b)^2=7a - 8b + 6c-3a6b + 2c+5a-4b8c+b(7- b) + (49-14b + b^2)= (7a3a + 5a) + (-8b6b4b + b(7- b)) + (6c + 2c8c) + (49-14b + b^2)= 7a - 3a + 5a - 8b - 6b4b7b-b^2 + 6c + 2c 8c +49-14b+ b^2= (7a3a + 5a) + (-8b6b4b + 7b14b) + (6c+2c8c) + (49)=9a 14b 4c + 49