Q1 of 23 Page 1

Attempt any four subquestions from the following:

For the quadratic equation 3x2 + 2x-1 = 0, find the value of the discriminant.

Given: quadratic equation 3x2 + 2x-1 = 0

Compare it with ax2 + bx + c = 0.


⇒ a = 3, b = 2 and c = -1.


Discriminant = D = b2 - 4ac


= (2)2 – 4(3)(-1)


= 4 + 12


= 16


More from this chapter

All 23 →
1

Attempt any four subquestions from the following:

A coin is tossed. For this random experiment write the sample space and find n(S).

 1

Attempt any four subquestions from the following:

Find the class mark of the class 10¾20.

 2

Attempt any four subquestions from the following:

Write the 25th term of an A.P. 12,16,20,24,………….. .

 2

Attempt any four subquestions from the following:

Find K, one of the roots of the quadratic equation kx2-7x + 12 = 0 is 3.