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Mathematics

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

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Answer

(2a + 0.5)(7a - 0.3)

= 2a (7a - 0.3) + 0.5 (7a - 0.3)

= 14a⁽¹⁺¹⁾ - 0.6a + 3.5a - 0.15

= 14a² + 2.9a - 0.15

Hence, (2a + 0.5)(7a - 0.3) = 14a² + 2.9a - 0.15

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