Question

If we subtract 4a-7ab+ 3b +12 from 12a -9ab+5b-3, then we get?​

Answer 1

Answer: 8a -2ab -10b -3

Step-by-step explanation:

12a -9ab + 5b -3 - (4a -7ab+3b +12b )

=12a -9ab + 5b -3 - 4a +7ab - 3b -12b

Rearranging by like terms:

=12a - 4a -9ab+7ab +5b -3b -12b -3

= 8a -2ab -10b -3

Answer 2

(12a - 9ab + 5b -3) -(4a - 7ab + 3b +12)

Whenever a - sign came before

a bracket the sign of the number

which are in the bracket changes itself

12a - 9ab + 5b - 3 - 4a +7ab - 3b - 12

12a - 4a - 9ab + 7ab +5b - 3b -3 -12

= 8a - 2ab + 2b - 15