7: Factorise a? - 2ab + b2 - c2
please solve with pic
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Answer:
(a - b +c)(a - b + c)
Step-by-step explanation:
a² - 2ab + b² - c²
(a - b)² - c² [using (a - b)² = a² - 2ab + b² identity]
(a - b + c)(a - b - c) [using a² - b² identity, a= a-b, b = c]
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