How do you plot −8+3i and find its absolute value?

1 Answer
Jim G.
Sep 19, 2016

see explanation.

Explanation:

From the origin, move 8 units to the left along the real axis then at right angles at this point move vertically upwards, parallel to the imaginary axis for 3 units.

This is the point (-8 ,3)

Since there is a right triangle formed from

0→−8→3→0 we can use Pythagoras' theorem to calculate it's magnitude, which is the distance from the origin to the point (-8 ,3)

⇒√82+32=√73← absolute value

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