Answer
$-11x^4y^2-11x^2y^2+2xy$
Work Step by Step
$$(7x^4y^2-5x^2y^2+3xy)+(-18x^4y^2-6x^2y^2-xy)$$ $$=7x^4y^2-5x^2y^2+3xy-18x^4y^2-6x^2y^2-xy$$ $$=(7x^4y^2-18x^4y^2)+(-5x^2y^2-6x^2y^2)+(3xy-xy)$$ $$=-11x^4y^2-11x^2y^2+2xy$$
College Algebra (6th Edition)
by Blitzer, Robert F.
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 - Page 61: 62
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