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what is the absolute value of 4-2i?

Sagot :

2

5
,
8
and

58
Explanation:
given a complex number
x
+
y
i
then the absolute value is

x
|
x
+
y
i
|
=

x
2
+
y
2
4
+
2
i
has
x
=
4
and
y
=
2

|
4
+
2
i
|
=

4
2
+
2
2
=

20
=
2

5
8
i
has
x
=
0
and
y
=
8

|
8
i
|
=

0
2
+
8
2
=
8

3
+
7
i
has
x
=

3
and
y
=
7

|

3
+
7
i
|
=

(

3
)
2
+
7
2
=

58