Q.HOW TO FIND OUT SQUARE ROOT OF TWO DIGIT NO. QUICKLY ?
TRICK:
EXAMPLE: (56)²=?
AS YOU KNOW FORMULA OF (a+b)²=a²+2ab+b²
so,now what we have to do...in that same formula we have to implement but instead of '+' sign replace by'/' which means two different terms.
Now,
the new formula is (a/b)²=a²/2ab/b²
Here a= 5; b=6
so, (5/6)²=5²/2*5*6/6²
=25/60/36
now add the 6 of 60 with 25 which will become 25+6=31
and in 60, there is left '0' only.
now, add the 3 of 36 with 0 which is left on 60 after adding 6 with 25. so 0+3=3
now, 6 is left in 36 .
so , the new no. are after adding and left = 31/3/6
Now, remove all slash'/' and the result is 3136 which is the sqaure root of 56.
DO MORE AND PRACTICE WITH DIFFERENT NO.
TRICK:
EXAMPLE: (56)²=?
AS YOU KNOW FORMULA OF (a+b)²=a²+2ab+b²
so,now what we have to do...in that same formula we have to implement but instead of '+' sign replace by'/' which means two different terms.
Now,
the new formula is (a/b)²=a²/2ab/b²
Here a= 5; b=6
so, (5/6)²=5²/2*5*6/6²
=25/60/36
now add the 6 of 60 with 25 which will become 25+6=31
and in 60, there is left '0' only.
now, add the 3 of 36 with 0 which is left on 60 after adding 6 with 25. so 0+3=3
now, 6 is left in 36 .
so , the new no. are after adding and left = 31/3/6
Now, remove all slash'/' and the result is 3136 which is the sqaure root of 56.
DO MORE AND PRACTICE WITH DIFFERENT NO.
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