1.

D) Show that.(a - b)(a + b) + (b -c)(b + c) + (c-a)(c + a) = 0​

Answer» ONG>Step-by-step EXPLANATION:

(a²-b²)+(b²-c²) +(c²-a²)

a²-b²+b²-c²+c²-a²

=0



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