Question

equacao do segundo grau com formula de delta y²-6y-7=0

Answer 1

∆=(-6)²-4(1)(-7)
∆=36+28 ∆=64
X=-(-6)+-√64/2(1)
X=6+-8/2
X=6+8/2=14/2=7
X=6-8/2=-2/2=-1