Question

formula for (a-b-c)²​

Answer 1

Answer:

➡ Refer to Attachment

Good question

Answer 2

(a - b - c)²

=> (a)² +(-b)² + (-c)² + 2× [ a×(-b)) + (-b)×(-c) + (-c)×a]

=> a² + b² + c² + 2 [ -ab + bc - ac]

=> a² + b² + c² - 2ab + 2bc - 2ac

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