Question

please explain Q2 please I will mark you as a brainlist promise ​

Answer 1

Answer:

FIRST WE WILL ADD THE NUMBERS AND THEN SUBTRACT IT

ADDITION

     3b^2 - 8 + 6b^2 - 6b +12

    3b^2 + 6b^2 -6b + 12 - 8

   9b^2 - 6b + 4

SUBTRACTION

   9b^2 - 6b + 4 - (b^2 + b +7 )

  9b^2 - b^2 - 6b - b + 4 - 7

  8b^2 - 7b - 3 ans.

NOW COMPLETE YOUR PROMISE

Step-by-step explanation:

Answer 2

8b²-7b-3

Step-by-step explanation:

The question is :

(3b²-8)+(6b²-6b+12)-(b²+b+7)=?

Answer:

3b²-8+6b²-6b+12-b²-b-7

=3b²+6b²-b²-6b-b-8-7+12

=9b²-b²-7b-15+12

=8b²-7b-3

Hope you understood!