Question

a+b=2 ; ab=1. Calcula:"a" al cudrado + ”b” al cuadrado

Answer 1

Resolución :
-------------------------------------------------------------------------------

a + b = 2 ; ab = 1

$( a + b )^{2} = 2^{2}$
$a^{2} + 2ab + b^{2} = 4$
$a^{2} + 2( 1 ) + b^{2} = 4$
$a^{2} + 2 + b^{2} = 4$
$a^{2} + b^{2} = 4 - 2$
$a^{2} + b^{2} = 2 = Rpta.$

Espero q te ayude!!!!!!!!!!!!!!!