(Q19)Write three quadratic polynomials that have no zeros for x that are real numbers.

The quadratic polynomial is

x-2 - 3x -4
2x2- 4x + 5
-x3 - 2x + 3
-x - 2

The quadratic polynomial is

x3 + 5x + 6
-3y + 2
-3x2 + 2x - 1
z4 - 16

The quadratic polynomial is

y4 - 25
y-2 - 3x + 2
x3 + 5z + 6
x2 - 2x + 4