Ask a Doubt
Request a call back

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

CBSE Class 9 Answered

the triangle  sides are x,x+1, 2x-1 and its area is root 10. What is the value of x
Asked by Nimmi | 13 Feb, 2019, 11:09: AM
answered-by-expert Expert Answer
Question should be :
The triangle  sides are x,x+1, 2x-1 and its area is xbegin mathsize 16px style square root of 10 end style. What is the value of x
Solution:
begin mathsize 16px style straight s space equals space fraction numerator straight x space plus space straight x space plus space 1 space plus space 2 straight x space minus space 1 over denominator 2 end fraction equals space 2 straight x By space Herons apostrophe space Formula colon Area space of space straight a space space triangle space equals space square root of straight s left parenthesis straight s space minus space straight a right parenthesis space left parenthesis straight s space minus space straight b right parenthesis left parenthesis straight s space minus space straight c right parenthesis space end root Here space straight a space equals space straight x comma space straight b space equals space straight x space plus space 1 space and space straight c space equals space 2 straight x space minus space 1 After space substituting space the space values comma space we space get rightwards double arrow straight x square root of 10 equals space square root of 2 straight x cubed space minus space 2 straight x squared end root Squaring space on space both space the space sides comma space we space get 10 straight x squared space equals space 2 straight x cubed space minus space 2 straight x squared rightwards double arrow 2 straight x to the power of 3 space space end exponent minus space 12 straight x squared space equals space 0 rightwards double arrow straight x to the power of 3 space space end exponent minus space 6 straight x squared space equals space 0 rightwards double arrow straight x squared space open parentheses straight x space minus space 6 close parentheses space equals space 0 space rightwards double arrow straight x squared space equals space 0 space or space space straight x space minus space 6 space equals space 0 rightwards double arrow straight x space equals space 0 space or space straight x space equals space 6 Length space can apostrophe straight t space be space zero. straight x space equals space 6 space end style
Answered by Yasmeen Khan | 13 Feb, 2019, 01:10: PM

Application Videos

Concept Videos

Multiple Choice Questions Practice Test
Answered Unanswered My Questions My Answers
CBSE 9 - Maths
laxman saves 10% More than his expenditure and bhuwan spends 10% more than his savings if laxman savings is 10% more than bhuwan expenditure what is the ratio of incomes of laxman and bhuwa
Asked by rathorgaurav2945 | 21 Apr, 2024, 10:31: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Maths
13. If x = (2 + sqrt(3)) find the value of x ^ 2 + 1/(x ^ 2)
Asked by monika.vns14 | 18 Apr, 2024, 05:15: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Maths
3√5+√3/√5-√3
Asked by gulshanelectronics2017 | 15 Apr, 2024, 05:35: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Maths
find the value of n in 7^2n+1÷49=7^3
Asked by tripura78839 | 12 Apr, 2024, 09:05: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Maths
how to solve it
question image
Asked by singhanjali0199 | 12 Apr, 2024, 08:29: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Maths
√2x^2+3x+√2
question image
Asked by killerstealer593 | 11 Apr, 2024, 07:50: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Maths
x²-22x+120
Asked by rson0295 | 01 Apr, 2024, 08:55: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Maths
Draw the graph of the equation of line 2x + 3y = 6. Write the co ordinates of the point where the line intersects X-axis and Y-axis.
question image
Asked by saee.shinde3069 | 31 Mar, 2024, 10:12: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Maths
locate √2 on number line
Asked by rathoreraj7296 | 31 Mar, 2024, 08:09: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Maths
ab is diameter of circle with centre o . CD is a code equal to the radius of the circle a c and b b when extend intersect at the point e prove that angle a e b is equals to 60 degree
Asked by divyanshibirla037 | 29 Mar, 2024, 03:26: 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
×