ПОВТОРЕННЯ І СИСТЕМАТИЗАЦІЯ » 20

Розв’яжіть рівняння: 1. x2 = 1 x = ± 1 2. x2 = 5 x = ±√5 3. x2 – 4 = 0 x2 = 4 x = ±2 4. x2 – 6 = 0 x2 = 6 x = ± √6 5. x2 – 3x = 0 x(x – 3) = 0 x = 0, x = 3 6. x2 + 2x = 0 x(x + 2) = 0 x = 0 x = –2 7. x2 = 5x x(x – 5) = 0 x = 0, x = 5 8. x2 = –7x x(x + 7) = 0 x = 0, x = –7.