Question

(a + b)2 + (a - b)²​

Answer 1

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

Answer:

$(a + b) ^{2} + (a - b) ^{2} = 0 \\( a ^{2} + 2ab \: + b ^{2} ) \: + (a ^{2} - 2ab \: + b^{2}) = 0 \\ (a ^{2} + b ^{2} ) \: + (a^{2} + b ^{2} ) \: = 0 \\ 2a ^{2} + 2b^{2} = 0 \\ 2(a^{2} + \: b ^{2} ) = 0$

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