Perfect square of trinomial
asked Jun 19, 2017 in Other Math Topics by Roxanne
reshown Jun 19, 2017 by Rod

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

First guess the square root from the first and last terms and sign of the middle term: 20xy-3z. Now check out the middle term coefficient. It should be 2*20*3=120. It is, so the expression is (20xy-3z)^2.

answered Jun 19, 2017 by Rod Top Rated User (510,360 points)
Welcome to, 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!
80,492 questions
84,419 answers
67,804 users