a² + b² - 2ab - 49 factorise this
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Answer:
(a-b+7)(a-b-7)
Explanation:
a² + b² - 2ab - 49
=a²-2ab+b²-49
=(a-b)²-(7)² as (a-b)²=a²-2ab+b² and 49= 7×7 = (7)²
=(a-b+7)(a-b-7)
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