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algebra

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1) 27x^3+8

2) 3x^2-x-4

  • algebra -

    The first is the sum of two cubes, you have a formula for that.
    The second:

    (3x -4)(x +1)

  • algebra -

    a^3 + b^3 = (a+b)(a^2-ab+b^2)
    here
    a = 3x
    b = 2
    You take it from there


    (3x-4)(x+1)

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