Question

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

Answer 1

Answer:

a2+d2

Step-by-step explanation:

a2-b2+b2-c2+c2-d2

a2-d2

Answer 2

Answer:

a^2-d^2

Step-by-step explanation:

a^2-b^2+b^2-c^2+c^2-d^2

=a^2-d^2