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Evaluate: (9 − Y) (7 + Y) - Mathematics

Sum

Evaluate: (9 − y) (7 + y)

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Solution

(9 − y) (7 + y) = 9(7 + y) − y (7 + y)

= 63 + 9y − 7y − y2

= 63 + 2y − y2

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APPEARS IN

Selina Concise Mathematics Class 8 ICSE
Chapter 12 Identities
Exercise 12 (D) | Q 1.3 | Page 155
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