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CBSE Class 11-science Answered

Answer for this question is? 
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Asked by dineshchem108 | 11 Dec, 2018, 10:21: PM
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begin mathsize 16px style open parentheses 5 plus square root of 2 close parentheses straight x squared minus open parentheses 4 plus square root of 5 close parentheses straight x plus 8 plus 2 square root of 5 equals 0 Comparing space with space ax squared plus bx plus straight c equals 0 straight a equals 5 plus square root of 2 comma space straight b equals negative open parentheses 4 plus square root of 5 close parentheses comma space straight c equals 8 plus 2 square root of 5 Let space straight alpha space and space straight beta space are space the space roots space of space the space equation. straight alpha space plus straight beta equals fraction numerator 4 plus square root of 5 over denominator 5 plus square root of 2 end fraction space and space αβ equals fraction numerator 8 plus 2 square root of 5 over denominator 5 plus square root of 2 end fraction Harmonic space mean space equals fraction numerator 2 over denominator begin display style 1 over straight alpha end style plus begin display style 1 over straight beta end style end fraction equals fraction numerator 2 αβ over denominator straight alpha space plus straight beta end fraction Harmonic space mean space equals fraction numerator 2 cross times fraction numerator 8 plus 2 square root of 5 over denominator 5 plus square root of 2 end fraction over denominator fraction numerator 4 plus square root of 5 over denominator 5 plus square root of 2 end fraction end fraction equals fraction numerator 2 cross times 2 open parentheses 4 plus square root of 5 close parentheses over denominator 4 plus square root of 5 end fraction equals 4 end style
Answered by Sneha shidid | 12 Dec, 2018, 09:20: AM

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CBSE 11-science - Maths
For a real number r, the quadratics x² + (r - 1) x + 6 and x² + (2r + 1) x + 22 have a common real root. The sum of the possible values of r can be expressed as a/ b where a, b are relatively prime positive integers. Compute 10a + b
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CBSE 11-science - Maths
Pls solve
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Asked by sdmbotch1123 | 18 Jan, 2023, 11:01: PM
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CBSE 11-science - Maths
complete solution set of the equation |x^2-3|+|2-x|=|x^2-x-1|
Asked by rajshekhara348 | 20 Jun, 2022, 11:23: PM
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CBSE 11-science - Maths
let the equations be x^2+x+2=0 and ax^2+bx+1=0 have atleast one common root then a+b equals to
Asked by sandeepkumarbhadauria41 | 15 Sep, 2021, 02:52: PM
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CBSE 11-science - Maths
Please solve all of these questions with proper explanation
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Asked by Suchismitasingha18 | 07 Aug, 2021, 04:44: PM
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CBSE 11-science - Maths
questions 6
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Asked by sohailsidmd002 | 11 Oct, 2020, 02:35: PM
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CBSE 11-science - Maths
find the value of p and q if the equation px²+5x+2=0 and 3x²+10x+q=0 have both roots in common.
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Asked by ssroul.tcbls | 02 Jul, 2020, 07:15: PM
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CBSE 11-science - Maths
   the equation x minus 2 to the power 2 + x - 2 - 2 = 0 has how many roots
Asked by avinashjha3012 | 22 Jun, 2020, 05:41: PM
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CBSE 11-science - Maths
The quadratic equation, who's roots are reciprocal of the roots of the equation- ax^2+bx+c,is?
Asked by drhimasingh | 26 May, 2020, 11:31: PM
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CBSE 11-science - Maths
write the quadratic equation, the arithmetic mean, Geometric mean of whose roots are A and G respectively
Asked by amanamit818 | 06 Oct, 2019, 11:03: AM
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