Ask a Doubt
Request a call back

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

ICSE Class 9 Answered

If root5 + root3/root over 5-root3 = x-y root15, find X, y. (3 marks) 
Asked by Prajvalsaraff | 15 Nov, 2018, 21:23: PM
answered-by-expert Expert Answer
begin mathsize 18px style fraction numerator square root of 5 plus square root of 3 over denominator square root of 5 minus square root of 3 end fraction equals straight x minus straight y square root of 15 LHS equals fraction numerator begin display style open parentheses square root of 5 plus square root of 3 close parentheses open parentheses square root of 5 plus square root of 3 close parentheses end style over denominator begin display style open parentheses square root of 5 minus square root of 3 close parentheses open parentheses square root of 5 plus square root of 3 close parentheses end style end fraction equals fraction numerator begin display style open parentheses square root of 5 plus square root of 3 close parentheses squared end style over denominator begin display style 25 minus 9 end style end fraction equals fraction numerator begin display style 8 plus 2 square root of 15 end style over denominator begin display style 16 end style end fraction equals fraction numerator begin display style 4 plus square root of 15 end style over denominator begin display style 8 end style end fraction equals 4 over 8 plus fraction numerator square root of 15 over denominator 8 end fraction equals fraction numerator begin display style 1 end style over denominator begin display style 2 end style end fraction minus open parentheses negative fraction numerator begin display style square root of 15 end style over denominator begin display style 8 end style end fraction close parentheses comparing space we space get straight x equals fraction numerator begin display style 1 end style over denominator begin display style 2 end style end fraction straight y equals negative fraction numerator begin display style 1 end style over denominator begin display style 8 end style end fraction end style
Answered by Arun | 16 Nov, 2018, 09:27: AM

Application Videos

Concept Videos

Multiple Choice Questions Practice Test
Answered Unanswered My Questions My Answers
ICSE 9 - Maths
cos37°/sin53°
Asked by mdhsharmag | 14 Oct, 2024, 22:40: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
ICSE 9 - Maths
prove that line joining the mid point of parallel side of trapezium divide in
Asked by pratikpandeykdp | 02 Oct, 2024, 20:21: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
ICSE 9 - Maths
AD=AC and B is a point in CD produced,show that AB>AD
Asked by smileymishra692 | 27 Sep, 2024, 15:13: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
ICSE 9 - Maths
If 2 ^ x = 3 ^ y = 12 ^ z prove that x = (2yz)/(y - z)
Asked by lolop1234567891 | 22 Sep, 2024, 21:51: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
ICSE 9 - Maths
Co ordinate geometry 3x+2y-5=0   1q x1 the value of x when y=7 Y1 the value of y when x=3
Asked by usha201125 | 20 Sep, 2024, 20:22: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
ICSE 9 - Maths
a+b=4 , ab=3; find 1/b(2)+1/b(2)+1/a(2)
Asked by amitsinghicse333 | 15 Sep, 2024, 08:32: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
ICSE 9 - Maths
concept of indices
Asked by sahanish486 | 06 Sep, 2024, 18:47: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
ICSE 9 - Maths
x2-49
Asked by indrakalipandey333 | 25 Aug, 2024, 11:53: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
ICSE 9 - Maths
4630550 / 4000
Asked by bharatisarnaiktl | 17 Aug, 2024, 19:02: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
ICSE 9 - Maths
Rates of interest for two consecutive years are 10% and 12% respectively . Find the % increase during these 2 years .
Asked by ritikariya2010 | 04 Aug, 2024, 10:33: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
My Class Videos Tests ₹ Plans Ask a Doubt