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The First Steps in Algebra
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Table of Contents
Case II.
6
a
2
+
2
a
b
−
3
a
c
−
b
c
.
a
b
x
y
+
c
x
y
+
a
b
c
+
c
2
.
a
x
−
a
y
−
b
x
+
c
y
−
c
x
+
b
y
.
(
a
−
b
)
2
−
2
c
(
a
−
b
)
.
74
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