Identify Common Factor: Look for a common factor in all terms.Check if there is a common factor that can be factored out from all terms of the polynomial 3q3−12q2−5q+20.There is no common factor in all terms.
Grouping for Facilitation: Group terms to facilitate factoring by grouping.We can group the terms as follows: (3q3−12q2) and (−5q+20).Now, factor out the common factors from each group.3q3−12q2=3q2(q−4)−5q+20=−5(q−4)
Factor by Grouping: Factor by grouping.Now that we have a common binomial factor (q−4), we can factor by grouping.The polynomial can be written as:3q2(q−4)−5(q−4)Factor out the common binomial factor (q−4):(q−4)(3q2−5)