Multiply: X + 4 by X − 5 - Mathematics

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Sum

Multiply: x + 4 by x − 5

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Solution

(x + 4)( x − 5) = x( x − 5) + 4(x − 5)

= x2 − 5x + 4x − 20

= x2 − x − 20

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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 1.07 | Page 143

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