Using Quadratic Formula to solve Quadratic Equations
Ncert Solutions Chapter 4 Quadratic Equations Exercise 4.3 Q4 Download this solution
4. The sum of reciprocals of Rehman’s ages (in years) 3 years ago and 5 years from now is
. Find his present age.
Solution:
Let present age of Rehman=
years
Age of Rehman 3 years ago =
years
Age of Rehman after 5 years =
years
According to the given condition:
Comparing quadratic equation
with general form
, we get
and
Using quadratic formula
, we get
Age cannot be in negative. Therefore, we discard
. Therefore, present age of Rehman is
years.
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