Question

(a + b)² + (a - b)²


please tell me someone and it should be correct and I will mark you as a brainlist promise​

Answer 1

Answer:

Step-by-step explanation:

(a+b)²+(a-b)²

(a+b)²=a²+b²+2ab

(a-b)²=a²+b²-2ab

(a+b)²+(a-b)²=(a²+b²+2ab+a²+b²-2ab)

(a+b)²+(a-b)²=(a²+b²+a²+b²)

(a+b)²+(a-b)²=2(a²+b²)

Answer 2

Step-by-step explanation:

[a+b]^2+[a-b]^2

[a+b] [a+b] +[a-b] [a-b]

a[a+b]+b[a+b]+a[a-b]-b[a-b]

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

[here, opposite sign will cancel the terms ab]

a^2+b^2+a&2+b^2

2[a^2+b^2]

a[a+b]^2