Question

Calcule o valor numérico daexpressão algébrica
a²+4a (para a=2/3)

Answer 1

a = 2/3

$a^2+4a\\\\\\ (\dfrac{2}{3} )^2+4.( \dfrac{2}{3}) \\\\\\ \dfrac{4}{9} + \dfrac{8}{3} \\\\\\\\\\ \dfrac{4}{9} + \dfrac{24}{9} \\\\\\ \boxed{\dfrac{28}{9} }$


Forte abraço!