Question

expand the following. (3a+1) (3a-2) (3a+4)
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Answer 1

27@^3+153@^2-18@-8

Step-by-step explanation:

let a be @

(3@+1)(3@-2)=(3@)^2-3@-2(3@+4)=

(3@)^3+(3@)^2-6@+(12@)^2-12@-8

=27@^3+153@^2-18@-8

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