Question

2° grau: y(y+2)+(y-1) 2=0 bhaskara

Answer 1

Y²+2y+2y-2=0
Y²+4y-2=0
∆=4²-4•1•(-2)
∆=16+8
∆=24
X=-(+4)±√24
÷2.1
X=-4±24
÷2
X=-4+24=20÷2=10÷2=5
X=-4-24=-28÷2=-14÷2=-7
S={-7,5}