Question

resolva;
pergunta a) (2a+3²)=


pergunta b) (α-2b)²

Answer 1

a)

$(2a + {3}^{2} ) \\ 2a + 3 \times 3 \\ 2a + 9$

b)

$(a - 2b) ^{2} \\ (a - 2b) \times (a - 2b) \\ a \times a - 2ab - 2ab - 2b \times ( - 2b) \\ {a}^{2} - 2ab - 2ab + {4b}^{2} \\ {a}^{2} - 4ab + {4b}^{2}$