Question

me ajuda a=raiz de 2... qual o valor de a ?

Answer 1

seria assim,
A=√2+A
A^2=(√2+A)^2
A^2=A+2
A^2-A-2=0

∆=(-1)^2-4.1.(-2)

√∆=3
A=-b+√∆/2a

A= 1+3/2

A=2