Factorising is reverse process of the expanding.
(x+a)(x+b)=x^{2}+(a+b)x+ab
The coefficient of x is the sum of 'a 'and 'b'.
The number is the product of the 'a' and 'b'.
Determine the number 'a' and 'b' from 'a+b' and 'ab'.
Solve this quiz using this formula.