Question

x2 +16x+63=0 aflați x

Answer 1

x²+16x+63=0
a=1
b=16
c=63
Δ=b²-4ac⇒Δ=256-252⇒Δ=4⇒√Δ=√4⇒Δ=2
x1x2=-b+-√Δ/2a⇒
x1=-16+2/2⇒-14/2⇒x1=-7
x2=-16-2/2⇒-18/2⇒x2=-9
sucees

Answer 2

x²+16x+63=0
ax²+bx+c=0
a=1, b=2, c=63
Δ=b²-4ac=256-252=4
x₁=(-b+√Δ)/2a=(-16+2)/2=-7
x₂=(-b-√Δ)/2a=(-16-2)/2=-9