Question

Fatore (a+1)²+2(a+1)+1

Answer 1

a²+2a+1+2a+2+1

a²+4a+4=0
∆=4²-4.1.4
∆=16-16
∆=0

a¹=-4+0÷2= -2

a²=-4-0÷2= -2

S={-2}