Question

Calcule o valor numérico da expressão :

a2+4a (para a=2/3)

Answer 1

(2/3)x2 +4x(2/3)
4/3 + 8/3
12/3
4

Answer 2

$a =\frac{2}{3}$

$( \frac{2}{3} * \frac{2}{1} )$ $+$ $( \frac{4}{1} * \frac{2}{3} )$

$\frac{4}{3} + \frac{8}{3} = \frac{12}{3} = 4$