Answers

2015-01-18T19:03:50+05:30
Maybe u can using linearization: 

by this formula: 

f(x) = f(a) + f'(a)(x-a) 
so, sqrt(54) = sqrt (49) + 5(0.5 / sqrt (49)) 
sqrt (54) = 7 + 5/14 that approach to sqrt (54) 

√54 = 7.348.. ----> which is the estimated decimal answer.. 

or 

√54 = √9√6 = 3√6 ----> which is the precise answer..
0
2015-01-19T15:29:24+05:30
3√6 .................................................
0