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Tamil Nadu Board of Secondary EducationSSLC (English Medium) Class 10

Find the sum and product of the roots for the following quadratic equation 3+1a=10a2 - Mathematics

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Question

Find the sum and product of the roots for the following quadratic equation

`3 + 1/"a" = 10/"a"^2`

Sum

Solution

3a2 + a = 10

3a2 + a – 10 = 0 comparing this with x2 – (α + β)

x + αβ = 0

`"a"^2 - (- 1/3)"a" + ((-10)/3)` = 0

α + β = `(-1)/(3)`

αβ = `(-10)/(3)`

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Quadratic Equations
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Chapter 3: Algebra - Exercise 3.9 [Page 109]

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Samacheer Kalvi Mathematics [English] Class 10 SSLC TN Board
Chapter 3 Algebra
Exercise 3.9 | Q 2. (iii) | Page 109
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