What are ‘difference of two squares’ and ‘completing the square’ in quadratic factorisation?
I have the following questions on a maths homework assignment:
Solve if possible by completing the square: x squared+11x+3=0
Factorise using the difference of two squares:
(x+5)squared – 81
(4x-3)squared – (x+1)squared
Also, how do I know where to use completing the square and difference of two squares [...]