explain me in above image marked part should be +or -

in Other Math Topics by Level 1 User (300 points)

Your answer

Your name to display (optional):
Privacy: Your email address will only be used for sending these notifications.
Anti-spam verification:
To avoid this verification in future, please log in or register.

1 Answer

The sign is minus because -(3(n-1)²+5(n-1))=-3(n-1)²-5(n-1) applying the distributive property to the minus sign. The distributive property crops up in the following lines, too, so the logic is correct.

by Top Rated User (617k points)

Related questions

1 answer
asked Feb 24, 2014 in Algebra 2 Answers by L.B.Yadav | 204 views
1 answer
asked Sep 15, 2013 in Algebra 1 Answers by anonymous | 129 views
1 answer
asked Feb 15, 2016 in Other Math Topics by anonymous | 528 views
Welcome to MathHomeworkAnswers.org, where students, teachers and math enthusiasts can ask and answer any math question. Get help and answers to any math problem including algebra, trigonometry, geometry, calculus, trigonometry, fractions, solving expression, simplifying expressions and more. Get answers to math questions. Help is always 100% free!
82,289 questions
86,817 answers
3,648 users