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Find the values of the following polynomials at a = – 2 and b = 3: ab+ba - Mathematics

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Question

Find the values of the following polynomials at a = –2 and b = 3:

`a/b + b/a`

Sum

Solution

Given, a = –2 and b = 3

So, putting a = –2 and b = 3 in the given expressions, we get

`a/b + b/a = ((-2))/3 + 3/((-2))`

= `(-2)/3 - 3/2`

= `(-4 - 9)/6`  ......[∵ LCM of 2 and 3 is 6]

= `(-13)/6`  

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Chapter 10: Algebraic Expressions - Exercise [Page 322]

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NCERT Exemplar Mathematics [English] Class 7
Chapter 10 Algebraic Expressions
Exercise | Q 66. (g) | Page 322
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