use a suitable identity to get each of the following products (2a - 7) (2a - 7)
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Answer:
4a²+49-28a
Step-by-step explanation:
= (2a-7)(2a-7)
= (2a-7)²
= (2a)²+(7)²-2×2a×7 using identity (a-b)²=a²+b²-2ab)
= 4a²+49-28a
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