Ask a Doubt
Request a call back

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

ICSE Class 9 Answered

Log(x²-21)=2,show that x=±11
Asked by velulatha74 | 27 Nov, 2018, 10:16: AM
answered-by-expert Expert Answer
begin mathsize 12px style log subscript 10 left parenthesis x squared minus 21 right parenthesis space equals space 2 space space space o r space space space open parentheses x squared minus 21 close parentheses space equals space 10 squared x squared space equals space 121 space space o r space space x space equals space plus-or-minus 11 end style
Answered by Thiyagarajan K | 27 Nov, 2018, 10:30: AM

Application Videos

Concept Videos

Multiple Choice Questions Practice Test
Answered Unanswered My Questions My Answers
ICSE 9 - Maths
(2X+3y+5)(2x+3y-5)
question image
Asked by shantanupandey271208 | 21 Apr, 2024, 03:03: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
ICSE 9 - Maths
Find the time in years in which ₹12500 will produce ₹ 3246.40 as compound interest at 8% per annum, interest compounded annually
Asked by harshansingh92 | 09 Apr, 2024, 06:10: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
ICSE 9 - Maths
3 rational numbers
Asked by gtdgyyydsyj | 09 Apr, 2024, 03:22: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
ICSE 9 - Maths
subtract 5√3+7√5 from 3√5-7√3
Asked by patnamprakash545 | 07 Apr, 2024, 05:23: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
ICSE 9 - Maths
if X+1÷x =6 find x-1/x ,x²-1/x²
Asked by ysubha24 | 06 Apr, 2024, 06:24: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
ICSE 9 - Maths
The point A(3,2)
question image
Asked by vipin13022011 | 03 Apr, 2024, 08:19: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
ICSE 9 - Maths
solve: 3^x-1x 5^2y-3=225
question image
Asked by jahnvi | 31 Mar, 2024, 01:10: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
ICSE 9 - Maths
a
question image
Asked by ay7599219263 | 28 Mar, 2024, 09:30: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
ICSE 9 - Maths
If a²-3a+1 = 0 and a≠0; find  1. a+1/a 2. a²+1/a²  
Asked by papunsarkar | 28 Mar, 2024, 08:30: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
ICSE 9 - Maths
on a certain sun of money the difference between the ci for a year , payable half yearly and the si for a year us Rs.120 find the sum lent out if the rate of interest in both cases is 10%pa
Asked by djhsm.sarah.hooda.sajid.nadiya | 25 Mar, 2024, 05:33: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
My Class Videos Tests ₹ Plans Ask a Doubt
Get Latest Study Material for Academic year 24-25 Click here
×