Question

find the value of (29)^2 by short shortcut method​

Answer 1

Answer:

29²

(30-1)²

30²+1¹-60

900+1-60

840+1

841

Answer 2

(29 )²

can be written as (20+9)²

so ,

(a+b)² = a²+b²+2an

Now,

(20+9)²= (20)²+(9)²+2*20*9

so, 400+81+360

= 841

easy ,right!