Question

(a+b)(a-b)+(b+c)(b-c)+(c+a)(c-a)
please help me​

Answer 1

= a²-b²+b²-c²+c²-a² = 0

pls mark as brainliest

Answer 2

Answer:

1

$a {}^{2} - b {}^{2} + b {}^{2} - c {}^{2} + c {}^{2} - a {}^{2}$

so = 1