Identify Common Factors: Look for common factors in the first two terms and the last two terms separately.For the first two terms, 16n3 and 8n2, the common factor is 8n2.For the last two terms, 18n and 9, the common factor is 9.
Factor Out Common Factors: Factor out the common factors from the first two terms and the last two terms.16n3+8n2=8n2(2n+1)18n+9=9(2n+1)
Factor Out Common Binomial: Now, we have two expressions 8n2(2n+1) and 9(2n+1) which share a common binomial factor (2n+1). Factor out the common binomial factor (2n+1). So, the factored form of 16n3+8n2+18n+9 is (2n+1)(8n2+9).