Առաջադրանքներ ՝ 616, 617, 618, 621

ա) x² — 6x + 8 = 0

D = b² — 4a * c
D = 36 — 4 * 8 = √68

X₁ = -b + √D / 2a
X₂ = -b — √D / 2a

X₁ = 6 + √68 / 2
X₂ = 6 — √68 / 2

բ) x² + 5x + 6 = 0

D = b² — 4a * c
D = 25 — 4 * 6 = √49 = 7

X₁ = -b + √D / 2a
X₂ = -b — √D / 2a

X₁ = -5 + 7 / 2 = 1
X₂ = -5 — 7 / 2 = -6

գ) x² — x — 2 = 0

դ

ե

զ

է

ը

թ

ժ