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pottersheep Group Title

Pleaseeee help, Grade 12! If x^3 - 4x^2 +kx =0 what value of k would result in two equal roots?

  • 2 years ago
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  1. josiahh Group Title
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    x(x^2-4x+k)=0 16-4k=0 so k=4

    • 2 years ago
  2. pottersheep Group Title
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    thank you so much

    • 2 years ago
  3. josiahh Group Title
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    np

    • 2 years ago
  4. pottersheep Group Title
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    sorry where did 16 -4k come from?

    • 2 years ago
  5. josiahh Group Title
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    b-sqrt(b^2-4ac)... that formula. so b^2-4ac=4^2-4k. as you can see, you can factor out an x to get a quadratic equation, use the quadratic formula to solve that equation and there you go :)

    • 2 years ago
  6. pottersheep Group Title
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    oooo thanks!

    • 2 years ago
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