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Question

Subtract $$4a -7ab + 3b + 12$$ from $$12a-  9ab + 5b-  3$$.


A
8a+2ab+2b+15
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B
8a+2b+15
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C
8a2ab+2b+15
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D
8a2ab+2b15
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Solution

The correct option is D $$8a-2ab + 2b-15$$
subtract $$4a - 7ab + 3b + 12$$ from $$12a- 9ab + 5b - 3$$

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

Mathematics

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