Find the Square of 2x − 5y - Mathematics

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Sum

Find the square of 2x − 5y

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Solution

(2x − 5y)2 = (2x)2 + (5y)2 − 2 × 2x × 5y

= 4x2 + 25y2 − 20xy

Concept: Expansion Form of Numbers
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APPEARS IN

Selina Concise Mathematics Class 8 ICSE
Chapter 12 Identities
Exercise 12 (B) | Q 2.02 | Page 152
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