Ask a Doubt
Request a call back

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

CBSE Class 10 Answered

given below
Asked by PRAMOD | 01 Dec, 2013, 02:00: PM
answered-by-expert Expert Answer
9x^2+6kx+4=0
Since, roots are equal, so disciminant = 0
(6k)2 - 4(9)(4) = 0
36k2 - 4 x 36 = 0
k2 = 4
k = +2. -2
 
So, the quadratic equation can be 
9x2+12x+4=0 or 9x2-12x+4=0
(3x+2)2=0 or (3x-2)2=0
x = -2/3, -2/3 or x = 2/3, 2/3
Answered by | 01 Dec, 2013, 02:45: PM

Application Videos

Concept Videos

Multiple Choice Questions Practice Test
Answered Unanswered My Questions My Answers
CBSE 10 - Maths
if one of the zeroes of quadratic polynomial F(x) = 4x² - 8kx - 9 is equal in magnitude but opposite in sign, find K
Asked by rrajansinghakb199 | 08 Apr, 2024, 05:12: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Maths
maths quadratic
question image
Asked by afiyamallick12 | 23 Feb, 2024, 11:32: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Maths
2 x square - 2 root 2 X + 1 is equal to 0
question image
Asked by goyelgurav | 18 Dec, 2023, 11:23: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Maths
(x+1)²=2(x-3)
Asked by Kunalbaniya384 | 25 Nov, 2023, 08:32: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Maths
if alpha and beta are the zeros of the polynomial ax2+bx+c find the value of alpha3+beta3
Asked by mehraharshit.dk000 | 05 Oct, 2023, 08:05: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Maths
If α and β are tge zeros of the polynomial x^2 - 6x + k and 3α + 2β=20 , then the value of k is
Asked by ruchipandey20071978 | 21 May, 2023, 10:00: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Maths
What is a quadratic equation.
Asked by varma.renu9481 | 25 Jan, 2023, 04:11: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Maths
your study room is shaped like a rectangle it has a area of 28 square cm and diameter 22 cm can you tell its dimensional
Asked by yogitamanojkumar | 09 Jan, 2023, 04:01: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Maths
hi
question image
Asked by chaudahryanshika | 03 Jan, 2023, 10:04: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Maths
Meena and Seema alone can complete the whole work in (9y+3) days and 9z days, respectively and Reena and Kisan alone can complete the whole work in (2x + 2) days and (x - y) days, respectively. Reena and Chhaya together can complete the whole work in 18 days and Jaya and Payal together can complete the whole work in 24 days. Payal and Chhaya alone can complete the whole work in (10z + 2) days, and 6z days respectively. Kisan and Ira together can complete the whole work in 120/7 days and Ira and Jaya alone can complete the whole work in (x + y) days and 14z days, respectively. Find x, y and z.
Asked by nk.neetuhome | 18 Nov, 2022, 03:43: 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
×