Answer
$49y^2 - 28y + 4$
Work Step by Step
Use the Square of a Difference Product Formula:
$(A-B)^2 = A^2-2AB+B^2$
with $A=2$ and $B=7y$:
$(2-7y)^2 = 2^2 - 2(2)(7y) + (7y)^2$
$=4 - 28y + 49y^2$
$=49y^2 - 28y + 4$
Precalculus: Mathematics for Calculus, 7th Edition
by Stewart, James; Redlin, Lothar; Watson, Saleem
Published by
Brooks Cole
ISBN 10:
1305071751
ISBN 13:
978-1-30507-175-9
Chapter 1 - Section 1.3 - Algebraic Expressions - 1.3 Exercises - Page 34: 32
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