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What is the factored form of (a^2-6) (a^2+4)

the answers that I can choose from are
a^4+ 2a^2+ 24
a^4- 2a^2 +24
a^4- 2a^2 -24
a^4+ 2a^2 -24

1 Answer

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(a^2 - 6)(a^2 + 4)

= a^4 + 4a^2 - 6a^2 - 24

= a^4 - 2a^2 - 24

Its the third choice.
User Rogercampos
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