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Properties of Multiplication of Integers

Multiply 2a2 ...

Question

Multiply (2a2 + 9a + 10) by 4a.
$[2 M a r k s]$

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Solution

4a × (2a² + 9a + 10)

= (4a × 2a²) + (4a × 9a) + (4a × 10)
$[1 M a r k]$

= 8a³ + 36a² + 40a
$[1 M a r k]$

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