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clara1223

  • one year ago

How to graph y=2x^2-2x-1 without a calculator

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  1. triciaal
    • one year ago
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    set up a table plot the points trace the curve

  2. triciaal
    • one year ago
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    or you can do the sketch find the intercepts when x =0 what is y and when y = 0 what is x

  3. sepeario
    • one year ago
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    exactly, as you know that it is in the form of a parabola.

  4. triciaal
    • one year ago
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    when you have a 2nd degree function the graph is that of a parabola

  5. triciaal
    • one year ago
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    ax^2 + bx + c when a is positive opens up and when a is negative opens down complete the square to find the vertex and axis of symmetry

  6. clara1223
    • one year ago
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    The problem is that when I solve for x when y=0 I get a complex number (i). I used the quadratic formula.

  7. triciaal
    • one year ago
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    |dw:1438567339286:dw|

  8. triciaal
    • one year ago
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    |dw:1438567728196:dw|

  9. triciaal
    • one year ago
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    |dw:1438567844462:dw|

  10. triciaal
    • one year ago
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    @clara1223 did you check your signs

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