College Algebra (6th Edition)

Published by Pearson
ISBN 10: 0-32178-228-3
ISBN 13: 978-0-32178-228-1

Chapter P - Prerequisites: Fundamental Concepts of Algebra - Exercise Set P.4: 62

Answer

$-11x^4y^2-11x^2y^2+2xy$

Work Step by Step

$$(7x^4y^2-5x^2y^2+3xy)+(-18x^4y^2-6x^2y^2-xy)$$ $$=7x^4y^2-5x^2y^2+3xy-18x^4y^2-6x^2y^2-xy$$ $$=(7x^4y^2-18x^4y^2)+(-5x^2y^2-6x^2y^2)+(3xy-xy)$$ $$=-11x^4y^2-11x^2y^2+2xy$$
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