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What is the correct answer of (1+a+b)(1+a+b)

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AnneCviz
Using distributive property,

(1+a+b)(1+a+b) = 1 + a + b + a + a² + ab + b + ab + b²
                       = 1 +2a +2b +a² +2ab +b²

Arranged in decreasing exponent: a² +b² + 2ab +2a +2b +1
Omneslalaineviz
1^2 + a^2 + b^2 + 2a + 2b
= 1 + a^2 + b^2 + 2a + 2b
= a^2 + b^2 + 2a + 2b + 1  -----  (final answer)