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3 October, 22:38

For y = 3x - 2x2 + 5x3, show how to find the value for y, when x = 3. Show your work

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  1. 3 October, 22:54
    0
    Y = 3 (3) - 2 (3) 2+5 (3) 3

    y = 9-2*3*2+5*9

    y=9-12+5*9

    y=9-12+45

    y=42
  2. 3 October, 22:57
    0
    6

    Step-by-step explanation:

    y = 3x - 2x² + 5*3

    when x = 3

    y = 3 (3) - 2 (3) ² + 15

    y = 9 - 18 + 15

    y = 15 + 9 - 15

    y = 24 - 18

    y = 6
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