Question

x²-y²+2x+1,factorise the following expression:​

Answer 1

Answer: x²-y²+2x+1

= (x²+2x+1)-y²

using (a+b)²=a²+2ab+b²

=> (x+1)²-y²

= (x+1+y)(x+1-y)

using a²-b²=(a+b)(a-b)

=> (x+y+1)(x-y+1)