Algebra and Trig question. Please show work. Serious replies only! Thankyou so much!?

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Express in terms of i and simplify: square root of - 243

a). -9 square root 2i
b). 12i square root 2
c). 9i square root 2
d). -12i square root 2

2007-04-10 01:53:03 · 4 answers · asked by cyberlove 1 in Science & Mathematics ➔ Mathematics

sqrt -243 = i * sqrt 243

sqrt 243 = sqrt 81 * sqrt 3

sqrt 243 = 9 * sqrt 3

therefore sqrt -243 = 9 i sqrt 3

2007-04-10 02:04:36 · answer #1 · answered by eddiervc 3 · 0⤊ 0⤋

â- 243 =

iâ243 =

i â81â3 =

9 i â3

- - - - - - s-

2007-04-10 10:00:25 · answer #2 · answered by SAMUEL D 7 · 0⤊ 0⤋

9i sqrt(3)

2007-04-10 08:58:54 · answer #3 · answered by Anks 1 · 0⤊ 0⤋

a) (-18i)
b) 24i
c) 18i
d) (-24i)

2007-04-10 08:57:58 · answer #4 · answered by lao_za_bo 1 · 0⤊ 0⤋