1.

(a + b)(a - b)+(b + c)(b -c)+(c + a) (c-a)​

Answer»

Step-by-step explanation:

ANSWER:

We know that a²-B²= (a-b)(a+b)

USING this formula, we can put it

(a + b)(a - b) = a²-b²

(b + c)(b -c)= b²-c²

(c + a) (c-a)= c²-a²

Putting these VALUES I get

a²-b²+b²-c²+c²-a²

All get CUT. off,

HENCE the answer is 0.


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