simplify. ( 9+b) (a-b-c) - (a-b) (2c)
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(9+b) (a-b-c) - (a-b) (2c)
(9a-9b-9c+ab-b^2-bc) - (2ac-2bc)
9a-9b-9c+ab-b^2-bc-2ac+2bc
9a-9b-9c+ab-b^2-2ac+bc
9(a-b-c)+b(a-b)-c(2a-b)
(a-b-c)(a-b)(2a-b)(9+b-c)
I’m not sure if this helped, but hopefully it did lol
(9a-9b-9c+ab-b^2-bc) - (2ac-2bc)
9a-9b-9c+ab-b^2-bc-2ac+2bc
9a-9b-9c+ab-b^2-2ac+bc
9(a-b-c)+b(a-b)-c(2a-b)
(a-b-c)(a-b)(2a-b)(9+b-c)
I’m not sure if this helped, but hopefully it did lol
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