Super
CSCA
CILI Blitz
🇬🇧
English
1 / 11
Check Your Knowledge
If
f
(
x
)
=
x
2
+
x
−
4
, evaluate
f
(
2
i
)
.
Substitute
x
=
2
i
and use
i
2
=
−
1
A
−
8
+
2
i
B
−
4
+
2
i
C
−
8
−
2
i
D
0
CHECK