Question

1+m+m²n+m³n
factorise without using identities. by regrouping and taking out common factors​

Answer 1

$\sf1 + m + {m}^{2} n + {m}^{3} n \\ \bf 1 + m + {m}^{2} n(1 + m) \\ \rm( 1 + m) \{1 + {m}^{2} n \}$