QUADRATIC EQUATION

Which of the following is not a quadratic equation

• x² + 3 x – 5 = 0

• x² + x³ + 2 = 0

• 3 + x + x² = 0

• x² – 9 = 0

The quadratic equation has degree

• 0

• 1

• 2

• 3

The polynomial equation x (x + 1) + 8 = (x + 2) (x – 2) is

• linear equation

• quadratic equation

• cubic equation

• none of the above

The equation (x – 2)² + 1 = 2x – 3 is a

• linear equation

• quadratic equation

• cubic equation

• none of these

The quadratic equation whose one of the roots is 1:

• 2x² + x – 1 = 0

• 2x² – x – 1 = 0

• 2x² + x + 1 = 0

• 2x² – x + 1 = 0

The equation 2x² + kx + 3 = 0 has two equal roots, then the value of k is

• ±√6

• ± 4

• ±3√2

• ±2√6

The sum of the roots of the quadratic equation 3x² – 9x + 5 = 0 is

• 3

• 6

• -3

• 2

If one root of the equation x² + p x + 12 = 0 is 4, while the equation x² + p x + q = 0 has equal roots, the value of q is

• 49/4

• 4/49

• 4

• 49

p and q are the roots of 4x² + 3x + 7 = 0, then the value of (1/p) + (1/q) :

• -3/7

• -3/4

• 3/7

• 7/4

If the roots of p x ² + q x + 2 = 0 are reciprocal of each other, then p is :

• 0

• -2

• +2 & -2

• +2