Evaluate: (1.6x + 0.7y) (1.6x − 0.7y) - Mathematics

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Sum

Evaluate: (1.6x + 0.7y) (1.6x − 0.7y)

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Solution

(1.6x + 0.7y) (1.6x − 0.7y)

= (1.6x)2 − (0.7y)2 ......[ ∵ (a − b) (a +b) = a2 − b2]

= 2.56x2 − 0.49y2

  Is there an error in this question or solution?

APPEARS IN

Selina Concise Mathematics Class 8 ICSE
Chapter 12 Identities
Exercise 12 (D) | Q 2.06 | Page 155
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