Question

Please answer this question with full explanation. ​

Answer 1

Answer:

7c^2-4c-1

Step-by-step explanation:

2c^2+7c^2-3c^2+c^2-3c-2c+c+6-3-4

=7c^2-4c-1

Answer 2

Answer:

7c^2 - 4c - 1

Step-by-step explanation:

(2c^2 - 3c + 6) + (-2c + 7c^2 - 3) + (c - 3c^2) + (-4 + c^2)

Rearrang for easy calculation

=> (2c^2 + 7c^2 - 3c^2 + c^2) + (-3c - 2c + c) + (6-3-4)

=> [ (2+7-3+1) c^2 ] + [ (-3-2+1) c ] + ( -1 )

=> 7c^2 + ( -4c ) - 1

=> 7c^2 - 4c - 1