Answer:
here your answer -56ab
Step-by-step explanation:
=(2a-7b-2a-7b)(2a-7b+2a+7b)
=-14b×4a
=-56ab
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Answer:
here your answer -56ab
Step-by-step explanation:
=(2a-7b-2a-7b)(2a-7b+2a+7b)
=-14b×4a
=-56ab
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