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Multiply: 2"X"+1/2"Y" and 2"X"-1/2"Y" - Mathematics

Sum

Multiply: `2"x"+1/2"y"` and `2"x"-1/2"y"`

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Solution

`(2"x"+1/2"y")(2"x"-1/2"y")`

= `2"x"(2"x"-1/2"y")+1/2"y"(2"x"-1/2"y")`

= `4"x"^2-"xy"+"xy"-1/4"y"^2`

= `4"x"^2-1/4"y"^2`

Concept: Multiplication of Algebraic Expressions - Multiplying Monomial by Monomials
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APPEARS IN

Selina Concise Mathematics Class 8 ICSE
Chapter 11 Algebraic Expressions
Exercise 11 (C) | Q 1.18 | Page 143
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