The function is .

Rewrite the above function  and let it be .

Graph:

Graph of function

Observe the graph roots of the function  is  and .

.

From the graph we can assume that .

Newtons approximation method formula : .

Apply derivative on each side with respect to .

\ \	\ \	\ \
\ \	\ \	\ \
\ \	\ \	\ \
\ \	\ \	\ \

From the above table

Consider 

\ \	\ \	\ \
\ \	\ \	\ \
\ \	\ \	\ \

From the above table 

The roots of the function  is  and .