Question

9) (a+b)2+(a - b)2 = a) 2 +1 b) & -B c) 2a + 2b d) 22 - 262 . i 1​

Answer 1

Answer:

[tex] (a-b)^{2}=a^{2}+b^{2}-2ab \\ (a+b)^{2}=a^{2}+b^{2}+2ab [/tex]

Step-by-step explanation:

when we add these two expansions we get 2a²+2b²