Question

basic math formula for fast culculation​

Answer 1

Answer:

There is no formula for fast calculation........

Answer 2

Answer:

Formulas Related to Number System

ab−−√=a−−√b√

ab−−√=a√b√

(a−−√+b√)(a−−√−b√)=a−b

(a+b√)(a−b√)=a2−b

(a−−√+b√)2=a+2ab−−√+b

apaq=ap+q

(ap)q=apq

apaq=ap−q

apbp=(ab)p

If a and b are integers, to rationalise the denominator of 1a√+b multiply it by a√−ba√−b

Integer Properties : For any integers a and b,

Addition of integers is commutative a + b = b + a

Addition of integers is associative a + ( b + c ) = ( a + b) + c

0 is the identity element under addition a + 0 = 0 + a = a

Multiplication of integers is commutative. a x b = b x a

1 is the identity element under multiplication 1 x a = a x 1 = a