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19 November, 17:15

How do you factor 2r^2 + 5r + 3

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  1. 19 November, 20:49
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    Magic and experience and trial and error

    use ac method

    2 times 3=6

    what 2 numbers multiply to get 6 and add to get 5?, 2 and 3

    split the middle number into those

    2r²+2r+3r+3

    group

    (2r²+2r) + (3r+3)

    factor

    2r (r+1) + 3 (r+1)

    undistribute

    (r+1) (2r+3)
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