1

$x^{2} + x - 6 = 0$

Zero roots

One root

Two roots

✗✓

2

$x^{2} - 8 x + 16 = 0$

Zero roots

One root

Two roots

✗✓

3

$x^{2} + 3 x - 3 = 0$

Zero roots

One root

Two roots

✗✓

4

$3 x^{2} + 12 x - 15 = 0$

Zero roots

One root

Two roots

✗✓

5

$3 x^{2} + 7 x + 5 = 0$

Zero roots

One root

Two roots

✗✓

6

$6 x^{2} - 36 x + 54 = 0$

Zero roots

One root

Two roots

✗✓