CBSE Class 10-Mathematics: Chapter –4 Quadratic Equations Part 12

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Question 16:

Solve for by quadratic formula

Answer:

Question 17:

Find the value of k for which the quadratic equation has real and distinct root.

Answer:

For real and distinct roots,

Question 18:

If one root of the equations is 1, find the value of a.

(a)

(b)

(c)

(d)

Answer:

(b)

Question 19:

Find k for which the quadratic equation has equal root.

(a)

(b)

(c)

(d)

Answer:

(c)

Question 20:

Determine the nature of the roots of the quadratic equation

Answer:

Question 21:

Find the discriminant of the equation

Answer:

Here,