Ncert Solutions Chapter 4 Quadratic Equations Exercise 4.3 Q2 Download this solution
How to find roots of Quadratic Equation using Quadratic Formula?
2. Find the roots of the following Quadratic Equations by applying quadratic formula.
(i)
(ii)
(iii)
(iv)
Solution (i)
Comparing quadratic equation
with general form
, we get
a=2, b=-7 and c=3.
Putting these values in quadratic formula
, we get
Solution (ii)
Comparing quadratic equation
with the general form
, we get
and
.
Putting these values in quadratic formula
, we get
Solution (iii)
Comparing quadratic equation
with the general form
, we get
and
.
Putting these values in quadratic formula
, we get
A quadratic equation has two roots. Here, both the roots are equal. Therefore,
Solution (iv)
Comparing quadratic equation
with the general form
, we get
and
.
Putting these values in quadratic formula
, we get
But, square root of negative number is not defined. Therefore, Quadratic Equation
has no solution.
Leave a Reply