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Expand (a + 2)(3a^2 + 2)(a - 12).

 Jan 6, 2024
 #1
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(a + 2)(3a2 + 2)(a - 12) →expand the first 2 brackets using distributive property

 

= (3a3+2a+6a2+4)(a-12)  → use distributive property again to multiply these 2 brackets together

 

=3a4-36a3+2a2-24a+6a3-72a2+4a-48 →group the like terms together, (the exponents)

 

=3a4-30a3-70a2-20a-48 → answer

 Jan 6, 2024

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