Evaluate: Xy2(X – 5y) + 1 for X = 2 and Y = 1. - Mathematics

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Sum

Evaluate: xy2(x – 5y) + 1 for x = 2 and y = 1.

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Solution

For x = 2 and y = 1

xy2(x – 5y) + 1

2 × 12 (2 − 5 × 1) + 1

2 × (2 − 5) + 1

2 × (−3) + 1

= −5

Concept: Multiplying a Polynomial by a Polynomial
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Chapter 11: Algebraic Expressions - Exercise 11 (C) [Page 143]

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Selina Concise Mathematics Class 8 ICSE
Chapter 11 Algebraic Expressions
Exercise 11 (C) | Q 12.2 | Page 143
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