Question 679053
{{{5z^4(z+1)-27z^2(z+1) = (5z^4-27z^2)(z+1) = z^2(5z^2-27)(z+1)}}}
.....................
Delighted to help; feel free to email if you have further questions.
HomeworkHelpers@readingboosters.com
-Reading Boosters
Website: www.MyHomeworkAnswers.com 
Wanting for others what we want for ourselves.