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Use the Direct Method to Evaluate the Following Products : (B – 3) (B – 5) - Mathematics

Sum

Use the direct method to evaluate the following products :
 (b – 3) (b – 5)

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Solution

(b – 3) (b – 5) = (b × b) + (b × −5) + (−3) × b + (−3) (−5)

= b2 − 5b − 3b + 15

= b2 − 8b + 15

Concept: Algebraic Identities
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APPEARS IN

Selina Concise Mathematics Class 8 ICSE
Chapter 12 Identities
Exercise 12 (A) | Q 1.4 | Page 150
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