Question

3-a² egal cu 2a cum aflu a ?

Answer 1

a²+2a=3
⇒a=1;
⇒1²+2·1
⇒1+2=3;

Answer 2

$3-a^2=2a \\ a:3-a^2=2 \\ a^2+2a=3 \\ a=1 \\ 1^2+2*1= \\ =\boxed{1+2=\boxed{3}}$