Answer
$x^2-4xy+4y^2$
Work Step by Step
We square (expand) the binomial to obtain:
$$
(x - 2y)^2= (x-2y)(x-2y)=x^2+2\cdot x \cdot (-2y)+(-2y)^2=x^2-4xy+4y^2
.$$
Precalculus: Concepts Through Functions, A Unit Circle Approach to Trigonometry (3rd Edition)
by Sullivan III, Michael
Published by
Pearson
ISBN 10:
0-32193-104-1
ISBN 13:
978-0-32193-104-7
Appendix A - Review - A.3 Polynomials - A.3 Assess Your Understanding - Page A31: 83
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