Fsc Part 1 Mathematics (Complete Solution)
Q1
Solve the Following equations
x^{4}  6x^{2} + 8 = 0
Solution
Putting x^{2} = t in the given equation
t^{2}  6t + 8 = 0
Comparing the given equation with at^{2} + bt + c = 0, we get
a = 1,
b = 6,
c = 8
b = 6,
c = 8
By Quardratic formula, we have
t = 

Putting the values of a, b, and c in the formula
t = 

t = 

t = 

t = 

Either 

OR 








Putting t = x^{2}, we get 









Hence Solution set =  {  2,   √2,  √2,  2  } 