Question

$(a + 1) {}^{2} + (a - 1) {}^{2}$
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Answer 1

Respuesta:

$(a + 1)^{2} +(a-1)^{2}\\\\ (a^{2}+2(a)(1) + 1^{2} ) + (a^{2}-2(a)(-1) + (-1)^{2} )\\\\\\(a^{2 } +2a +1 )+( a^{2} + 2a + 1)\\a^{2 } +2a +1 + a^{2} + 2a + 1\\\\2a^{2} + 4a + 1$

Explicación paso a paso: