(4a—7b) (4a+7b)
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(4a—7b) (4a+7b)
plz do this question
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Answer:
16a²−49b²
Step-by-step explanation:
(4a−7b)(4a+7b)
=(4a+−7b)(4a+7b)
=(4a)(4a)+(4a)(7b)+(−7b)(4a)+(−7b)(7b)
=16a²+28ab−28ab−49b²
=16a²−49b²
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