Question

(a – b) (a + b) + (b – c) (b + c) + (c – a) + (c + a) =
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Answer 1

Answer:

Add a−b+ab,b−c+bc,c−a+ac

ANSWER

To add:

a−b+ab, b−c+bc, c−a+ac

a−b+b−c+c−a +ab+bc+ac

=0+ab+bc+ac

=ab+bc+ac

• here is your answer.
• hopes it helps you....