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Evaluate: (4x2 − 5y2) (4x2 + 5y2) - Mathematics

Sum

Evaluate: (4x2 − 5y2) (4x2 + 5y2)

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Solution

(4x2 − 5y2) (4x2 + 5y2)

= (4x)2 − (5y2)

= 16x4 − 25y4 ......[ ∵ (a − b) (a + b) = a2 − b2]

Concept: Product of Sum and Difference of Two Terms
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APPEARS IN

Selina Concise Mathematics Class 8 ICSE
Chapter 12 Identities
Exercise 12 (D) | Q 2.05 | Page 155
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