Question

$(a + b) {}^{2} + (a - b) {}^{2}$


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Answer 1

Answer: $2a^{2} + 2b^{2}$

Step-by-step explanation:

(a + b)$.^{2}$ + (a - b)$.^{2}$

= a$.^{2}$ + b$.^{2}$ + 2ab + a$.^{2}$ + b$.^{2}$ - 2ab

= a$.^{2}$ + a$.^{2}$ + b$.^{2}$ + b$.^{2}$ + 2ab - 2ab

= 2a$.^{2}$ + 2b$.^{2}$