Question

(a + b)²+ (a - b)².
please said me the right answer​

Answer 1

Step-by-step explanation:

a²+b²+2ab + a²+b² -2ab

2a²+ 2b²

2(a²+b²)

Answer 2

Step-by-step explanation:

It's 4ab.

(a+b)2=a2+b2+2ab  

(a−b)2=a2+b2−2ab  

For simplicity, let:

a2+b2=x  

2ab=y  

That gives us  (a+b)2=x+y  and  (a−b)2=x−y.  So:

(a+b)2−(a−b)2=x+y−x−y  

⟹(x−x)+(y−(−y))  

⟹0+y+y=2y⟹4ab

hope this is an correct answer