Question

(1/2a + 3) ao quadrado

Answer 1

Lembrando que:

$(a + b)^2 = a^2 + 2ab + b^2$

$(\frac{1}{2} + 3)^2 \Rightarrow (\frac{1}{2})^2 + 2\cdot(\frac{1}{2})\cdot3 + 3^2) \Rightarrow \frac{1}{4} + 3 + 9 \Rightarrow \frac{13}{4} + 9 \Rightarrow \frac{49}{4}$