Question

(a-7 ab +3b+12) - (12a-9ab+9ab+5b-3)​

Answer 1

$-11a-7ab-2b+15$

Step-by-step explanation:

$(a-7ab+3b +12) - ( 12a - 9ab + 9ab + 5b -3)\\= a - 7ab + 3b + 12 -12a +9ab -9ab -5b + 3\\= a - 12a - 7ab + 9ab - 9ab + 3b - 5b + 12 + 3\\= -11a -7ab-2b+15$

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