Question 33585
There is another simple step to get ur answer.

the given equation is (x+8)^2 = 81


      this can be written as (x +8)^2 = 9^2  (9*9= 81 right)

 now taking sqrt on both sides we get,
    
                             x +8 =+ OR - 9
therefore      FOR +9,      x = 9 -8
                              X  =1

                FOR -9, x= -9 -8
                         x = -17
IS THIS SIMPLE..
YEAH..
VISIT MY SITE (CLICK ME) TO LEARN MATHS ONLINE..
STEP BY STEP TEACHING..
PRIYA