(5-3i)(6+2i)=36+8i Is this correct?!?

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2007-12-03 08:10:51 · 4 answers · asked by Mina203 2 in Science & Mathematics ➔ Mathematics

30-18i+10i-6i^2

-6i^2-8i+30
-6(-1)
36-8i

2007-12-03 08:46:39 · answer #1 · answered by Dave aka Spider Monkey 7 · 0⤊ 0⤋

30 + -18i + 10i -6*(-1) = 30 - 8i + 6 =

36 - 8i

2007-12-03 08:15:59 · answer #2 · answered by sayamiam 6 · 0⤊ 0⤋

No. It should be 36-8i. Use your FOIL rule.
The sum of the middle terms is (-18+10)i = -8i.

2007-12-03 08:17:28 · answer #3 · answered by steiner1745 7 · 0⤊ 0⤋

close... (36-8i)

10i-18i...

2007-12-03 08:15:05 · answer #4 · answered by Trevor H 3 · 0⤊ 0⤋