When
f
(
x
)
=
2
x
2
−
x
−
2
\displaystyle {f{{\left({x}\right)}}}={2}{x}^{{2}}-{x}-{2}
f
(
x
)
=
2
x
2
−
x
−
2
, evaluate
f
(
−
1
)
\displaystyle {f{{\left(-{1}\right)}}}
f
(
−
1
)
f
(
−
1
)
=
\displaystyle {f{{\left(-{1}\right)}}}=
f
(
−
1
)
=
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Question 6
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