Mathematics - Quiz

A quadratic equation has degree

• 0

• 1

• 2

• 3

A polynomial equation x(x+1) + 8 = (x+2) (x-2) is

• linear equation

• quadratic equation

• cubic equation

• bi-quadratic equation

The sum of roots of quadratic equation  $3x^2\ -\ 9x\ +\ 5\ =\ 0$  is 

• 3

• 6

• -3

• 2

The roots of equation  $7x^2\ +\ x-1$  are

• real and distinct 

• real and same

• imaginary/not real

• none of the above

The equation  $12x^2+4kx+3\ =\ 0$  has real and equal roots if,

• k =  $\pm$  3

• k =  $\pm$  9

• k = 4

• k =  $\pm$  2

If -5 is root of quadratic equation  $2x^2+px-15=0$  then the value of p is

• p = 5

• p = 3 

• p = 7

• p = 1

One year ago, a man was 8 times as old as his son. Now his age is equal to the square of his son age. Their present ages are..

• 7 years, 49 years

• 5 years , 25 years

• 1 year, 50 years

• 6 years, 49 years

 Which of the following are the roots of equation  $x^2-9x+20=0$  

• 3, 4

• 4, 5

• 5, 6

• 6, 1

ax + b = 0 is general form of

• quadratic equation

• linear equation

• cubic equation

• none of the above

The roots of the quadratic equation are real and same if

• $b^2-4ac$ <0

• $b^2-4ac$ = 0

• $b^2-4ac$ >0

• None