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26 March, 04:56

F (3) = x^ (3) - 19x+30

Show that is equation = 0

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Answers (1)
  1. 26 March, 05:13
    0
    Sub in 3 for all the x: = (3) ³ - 19 (3) + 30

    Expand the brackets: = 27 - 57 + 30

    Solve the equation: = 0

    Say you've solved it: QED
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