Question

responda a letra A e a B por favor

Answer 1

a)

${(10 - x)}^{2} = 100 - 20x + {x}^{2}$

b)

$area = {l}^{2} \\ 16 = {l}^{2} \\ l = \sqrt{16} = 4cm$

$area = 100 - 20.4 + {4}^{2} \\ area = 100 - 80 + 16 = 20 + 16 = 36 {cm}^{2}$


Bons estudos :p