Question

A elevado ao quadrado + 4a para a= 2/3​

Answer 1

a²+4a

sendo a=2/3

(2/3)²+4(2/3)

4/9+8/3

4/9+24/9

28/9≈3,11

Answer 2

${a}^{2} + 4a = x \\ a = \frac{2}{3} \\ (\frac{2}{3} )^{2} + 4 \times \frac{2}{3} = \frac{4}{9} + \frac{8}{3} = \\ = \frac{4 + 8 \times 3}{9} = \frac{28}{9}$