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Question
Subtract the second expression from the first:
3a2 - 8ab - 2b2 , 3a2 - 4ab + 6b2
Sum
Solution
(3a2 - 8ab - 2b2) - (3a2 - 4ab + 6b2 )
= 3a2 - 8ab - 2b2 - 3a2 + 4ab - 6b2
= 3a2 - 3a2 - 2b2 - 6b2 - 8ab + 4ab
= 0 - 8b2 - 4ab
= - 4ab - 8b2
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