Question

Calcule os quadrados:

a) (a+7)²

b) (1/2a + 3/1)²

Answer 1

a)
${(a + 7)}^{2} = {a}^{2} + 2 a \times 7 + {7}^{2} = {a}^{2} + 14a + 49$
b)
$\frac{1}{9} {a}^{2} + 2a + 9$