Question

Factorize each of the following expression:
a² − b² + a − b

Answer 1

$$\begin{gathered} a^2-b^2+a-b=(a^2-b^2)+(a-b)[Groupingtheterms] \\ =(a+b)(a-b)+(a-b) \\ =(a-b)(a+b+1)[Takingoutthecommonfactor(a-b\left)\right] \end{gathered}$$