The Sides of a Triangle Are X2 – 3xy + 8, 4x2 + 5xy – 3 and 6 – 3x2 + 4xy. Find Its Perimeter. - Mathematics

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Sum

The sides of a triangle are x2 – 3xy + 8, 4x2 + 5xy – 3 and 6 – 3x2 + 4xy. Find its perimeter.

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Solution

Required perimeter = Sum of three sides

= x2 − 3xy + 8 + 4x2 + 5xy − 3 + 6 − 3x2 + 4xy

= x2 + 4x2 − 3x2 − 3xy + 5xy + 4xy + 8 − 3 + 6

= 2x2 + 6xy + 11

Concept: Combining like Terms
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Chapter 11: Algebraic Expressions - Exercise 11 (B) [Page 140]

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Selina Concise Mathematics Class 8 ICSE
Chapter 11 Algebraic Expressions
Exercise 11 (B) | Q 10 | Page 140
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