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Mathematics
Mathematics
Problem
If
x
=
4
+
3
i
x = 4 + 3i
x
=
4
+
3
i
(where
i
=
−
1
i = \sqrt{-1}
i
=
−
1
), then the value of
x
3
−
4
x
2
−
7
x
+
12
x^3 - 4x^2 - 7x + 12
x
3
−
4
x
2
−
7
x
+
12
equals: (a)
−
88
-88
−
88
(b)
48
+
36
i
48 + 36i
48
+
36
i
(c)
−
256
+
12
i
-256 + 12i
−
256
+
12
i
(d)
−
84
-84
−
84
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