1.

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

Answer»

12a - 9ab + 5a - 3 - ( 4a - 7ab + 3b + 12 ) = 12a - 9ab + 5b - 3 - 4a + 7ab - 3b - 12 = 8a - 2ab + 2b - 15

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