Question

Simplify: a
2 + b
2 + 2ab - a
2 + b
2
- 2ab

Answer 1

Answer:

4ab

Step-by-step explanation:

= (a+b)^2 - (a-b)^2 = 4ab

= a^2 + b^2 +2ab - (a^2 +b^2 - 2ab)

= a^2 + b^2 +2ab - a^2 - b^2 + 2ab

= 2ab + 2ab = 4ab