Question

what is factorisation and identities formula

Answer 1

factorisation can be done by three methods :
splitting the middle term
completing the square
cross multiplication method
identities formula :
(a+b)²= a²+2ab+b²
(a-b)²=a²-2ab+b²
a²-b²=(a+b) (a-b) and so on.......

Answer 2

FACTORISATIONis a decomposition of mathametical object into a product of other object which when multiplied together give the original . IDENTITIES An identity is an equality that holds true regardless of the values chosen for its variables.They are used in simplifying or rearranging algebra expressions. By definition, the two sides of an identity are interchangeable, so we can replace one with the other at any time.