Question

simplify: (a + b)(a - b)+(b + c)(b-c)+(c + a)(c-a).​

Answer 1

Answer:

zero

Step-by-step explanation:

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

= (a² - b²) + (b² - c²) + (c² - a²)

= 0