From Förberedande kurs i matematik 2

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-	{{NAVCONTENT_START}}	+	By calculation, we obtain
-	<center> [[Bild:3_2_1c.gif]] </center>	+
-	{{NAVCONTENT_STOP}}	+
		+	{{Displayed math||<math>2z+w = 2(2+i)+(2+3i) = 2\cdot 2 + 2 + (2+3)i = 6+5i</math>}}
-	[[Bild:3_2_1_c1.gif|center]]	+	and we can mark this point on the complex plane.
-	[[Bild:3_2_1_c2.gif|center]]	+	If we treat <math>z</math> and <math>w</math> as vectors, then <math>2z</math> is the vector which has the same direction as <math>z</math>, but is twice as long.
		+
		+	[[Image:3_2_1_c1.gif|center]]
		+
		+	We add <math>w</math> to this vector and get <math>2z+w</math>.
		+
		+	[[Image:3_2_1_c2.gif|center]]

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Current revision

By calculation, we obtain

\displaystyle 2z+w = 2(2+i)+(2+3i) = 2\cdot 2 + 2 + (2+3)i = 6+5i

and we can mark this point on the complex plane.

If we treat \displaystyle z and \displaystyle w as vectors, then \displaystyle 2z is the vector which has the same direction as \displaystyle z, but is twice as long.

We add \displaystyle w to this vector and get \displaystyle 2z+w.