Question

Sendo
$a + b = 16$
$( {a}^{2} - {b}^{2} ) = 48$
calcule :
$a$

Answer 1

Boa noite

a + b = 16

(a² - b²) = 48 

(a + b)*(a - b) = 48
a - b = 48/16 = 3 

sistema

a + b = 16
a - b = 3

2a = 19
a = 19/2

b = 32/2 - 19/2 = 13/2