Request a call back

Join NOW to get access to exclusive study material for best results

CBSE Class 11-science Answered

the roots of -18i
Asked by simrangurdasani05 | 17 Jul, 2022, 03:39: AM
answered-by-expert Expert Answer
Let -18i = a + ib
L e t space square root of negative 18 i end root equals a plus i b
rightwards double arrow negative 18 i equals a squared minus b squared plus 2 i a b
C o m p a r i n g space r e a l space a n d space i m a g i n a r y space t e r m s space w e space g e t
a squared minus b squared equals 0 space space a n d space 2 a b equals negative 18 space rightwards double arrow space b equals negative 9 over a
rightwards double arrow a squared minus 81 over a squared equals 0
rightwards double arrow left parenthesis a squared minus 9 right parenthesis left parenthesis a squared plus 9 right parenthesis equals 0
rightwards double arrow a squared equals 9
rightwards double arrow a equals plus-or-minus 3
W h e n space a equals 3 space w e space g e t space b equals negative 3
W h e n space a equals negative 3 space w e space g e t space b equals 3
H e n c e comma space square root of negative 18 i end root equals plus-or-minus left parenthesis 3 plus 3 i right parenthesis
Answered by Renu Varma | 17 Jul, 2022, 21:40: PM
CBSE 11-science - Maths
Asked by khairulmasud380 | 08 Feb, 2024, 00:22: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Maths
Asked by moulya123 | 08 Jan, 2024, 06:18: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Maths
Asked by saanvichawla2007 | 02 Oct, 2023, 00:10: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Maths
Asked by Imotheph1504 | 19 Dec, 2022, 20:19: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Maths
Asked by simrangurdasani05 | 17 Jul, 2022, 03:39: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Maths
Asked by yogineepawar2002 | 19 Apr, 2021, 10:09: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Maths
Asked by gurjarg3619 | 22 Mar, 2021, 10:55: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
Are You a Teacher or a Parent Seeking Customised Tests? Click here
×