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25 September, 13:16

Simplify (3r^2+4) (2r-1).-8r^3+6r^2

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  1. 25 September, 17:11
    0
    First simpliify

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

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

    (6r^3+8r) + (-3r^2-4) =

    6r^3+8r-3r^2-4=

    put back

    6r^3-3r^2+8r-4-8r^3+6r^2=

    -2r^3+3r^2+8r-4
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