Multiply and simplify:
(
x
−
1
)
(
3
x
+
1
)
\displaystyle {\left({x}-{1}\right)}{\left({3}{x}+{1}\right)}
(
x
−
1
)
(
3
x
+
1
)
3
x
2
+
2
x
−
1
\displaystyle {3}{x}^{{2}}+{2}{x}-{1}
3
x
2
+
2
x
−
1
3
x
2
−
4
x
−
1
\displaystyle {3}{x}^{{2}}-{4}{x}-{1}
3
x
2
−
4
x
−
1
3
x
2
−
1
\displaystyle {3}{x}^{{2}}-{1}
3
x
2
−
1
3
x
2
−
2
x
−
1
\displaystyle {3}{x}^{{2}}-{2}{x}-{1}
3
x
2
−
2
x
−
1
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