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Use a Suitable Identity to Get the Following Products (2a ­− 7) (2a − 7) - Mathematics

Use a suitable identity to get the following products

(2a ­− 7) (2a − 7)

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Solution

(2a ­− 7) (2a − 7) = (2a − 7)2

= (2a)2 − 2(2a) (7) + (7)2 [(a − b)2 = a2 − 2ab + b2]

= 4a2 − 28a + 49

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APPEARS IN

NCERT Class 8 Maths Textbook
Chapter 9 Algebraic Expressions and Identities
Exercise 9.5 | Q 1.03 | Page 151
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