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Gabryiela
a fost răspuns

X la puterea 2 +11x+30

Răspuns :

Lonely11
x²+11x+30=0
Δ=b²-4ac
Δ=11²-4×1×30
Δ=121-120
Δ=1

x1=(-b+√Δ)/2a=(-11+√1)/2×1=-11+1/2=-10/2=-5
x2=(-b-√Δ)/2a=(-11-√1)/2×1=-11-1/2=-12/2=-6