Request a call back

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

CBSE Class 9 Answered

2x^2/3-12x/3=28
Asked by poojavinti | 10 Jul, 2019, 09:20: PM
answered-by-expert Expert Answer
begin mathsize 16px style fraction numerator 2 straight x squared over denominator 3 end fraction minus space fraction numerator 12 straight x over denominator 3 end fraction equals space 28
rightwards double arrow 2 straight x squared space minus space 12 straight x space equals space 28 space cross times space 3
rightwards double arrow space straight x squared space minus space 6 straight x space equals space fraction numerator 28 space cross times space 3 over denominator 2 end fraction
rightwards double arrow space straight x squared space minus space 6 straight x space equals 42
space rightwards double arrow space straight x squared space minus space 6 straight x space minus 42 equals space 0
Here space straight a space equals space 1 comma space straight b space equals space minus 6 space and space straight c space equals space minus 42.
rightwards double arrow space straight x space equals space fraction numerator negative straight b plus-or-minus square root of straight b squared minus 4 ac end root over denominator 2 straight a end fraction equals space fraction numerator begin display style negative open parentheses negative 6 close parentheses plus-or-minus square root of left parenthesis negative 6 right parenthesis squared minus 4 left parenthesis 1 right parenthesis left parenthesis negative 42 right parenthesis end root end style over denominator begin display style 2 cross times 1 end style end fraction equals space 3 plus-or-minus square root of 51
rightwards double arrow space straight x equals space 3 plus square root of 51 space or space space straight x equals space 3 minus square root of 51

end style
Answered by Renu Varma | 11 Jul, 2019, 10:06: AM
CBSE 9 - Maths
Asked by krushnachate256 | 12 Jun, 2024, 02:17: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Maths
Asked by shilpasreelakshmi | 11 Jun, 2024, 11:47: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Maths
Asked by ruthy385 | 10 Jun, 2024, 08:49: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Maths
rd
question image
Asked by rhymeshikha | 10 Jun, 2024, 12:02: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Maths
Asked by rhymeshikha | 09 Jun, 2024, 09:22: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Maths
Asked by paridimpy7 | 09 Jun, 2024, 06:50: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Maths
Asked by prachichauhan2011 | 09 Jun, 2024, 05:53: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Maths
Asked by ad7802027 | 08 Jun, 2024, 12:49: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Maths
1) The students in XYz School decided to set up a triangular garden with a tiled pathway It. They chose the dimensions of the triangle to be 15 meters, 30 meters, and 35 meters for the side width of the pathway is 1.5 meters.  a) Calculate the area of the triangular garden.  b) What will be the new dimensions of the triangle if we include the pathway? c) Calculate the area of the triangular garden including the pathway. d) Determine the area covered by tiles for the pathway   2) In a triangular park, the lengths of the sides are 15 m, 22 m, and 25 m. A smaller triangular flower bed is to be made inside the park with midpoints of each side of the park as vertices. Flnd the area of the smaller triangular flower bed and the remalning area of the park outside the flower bed. 3) Sides of a triangle are in the ratio of 3: 5 :7 and its perimeter is 300cm. Its area will be: (1) a.1000V3 sq.cm   b.1500V3sq.cm    c.1700V3 sq.cm    d.1900V3s4.cm  4) The length of altitude of an equilateral triangle of side a unit is  a.v3/2a   b.v3/4a   c.V3/2a   d. none of these  5) Find the area of a triangle having the length of sides as 3,4 and 5 units respectively.  6) The length of the sides of a trilangle is 5x, 5x and 8x. Find the area of the triangle.  7) Find the area of the triangle having sides1 m, 2m and 2 m.   8) The sides of a triangular flower bed are 5m,8 m and11m.Find the area of the flower bed. 9) An isosceles right triangle has area 8cm². Find the length of its hypotenuse.
question image
Asked by SIVESH.DASH | 04 Jun, 2024, 08:25: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
Get Latest Study Material for Academic year 24-25 Click here
×