Question

(a + b)^2 + (a - b)^2 – (a + b)(a - b) is
options :-
A) a^2- b^2
B) a^2 + 3b^2
C) a^2 + 2b^2
D) 2a^2 + 2b^2​

Answer 1

Answer:

Option B is correct

Step-by-step explanation:

(a + b)^2 = a^2 + b^2 +2ab     (equation 1)

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

(a + b)(a - b) = a^2 - b^2         (equation 3)

adding equation 1 and 2 we get

2a^2 + 2b^2 (equation 4)

Now,

equation 4 - equation 3

2a^2 + 2b^2 - a^2 + b^2 = a^2 + 3b^2

Thank You!!

Answer 2

Answer:

Step-by-step explanation:

first a^2-b^2 s ko formula is (a+b)(a-b)