Evaluate: (2a + 0.5) (7a − 0.3) - Mathematics

Evaluate: (2a + 0.5) (7a − 0.3)

Sum

(2a + 0.5) (7a − 0.3)

= 2a (7a − 0.3) + 0.5 (7a − 0.3)

= 14a²− 0.6a + 3.5a − 0.15

= 14a² + 2.9a − 0.15

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Chapter 12: Identities - Exercise 12 (D) [Page 155]

Chapter 12 Identities
Exercise 12 (D) | Q 1.2 | Page 155

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(–2x + 3y + 2z)²

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`[3/2x+1]^3`

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Prove that a² + b² + c² − ab − bc − ca is always non-negative for all values of a, b and c

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(2x − 5y)³ − (2x + 5y)³

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9m - 2n

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(95)²

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m² - n².