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Mathematics

Evaluate:
(0.5 - 2a) (0.5 + 2a)

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Answer

(0.5 - 2a) (0.5 + 2a)

Using the formula

[∵ (x + y)(x - y) = x² - y²]

= (0.5)² - (2a)²

= 0.25 - 4a²

Hence, (0.5 - 2a) (0.5 + 2a) = 0.25 - 4a²

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