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    How to do this q's djsutt0n

    5(t(squared)-2)To be squared-7(t(squarded)-2)-10=0

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      Dazzla16

      Hi djsutt0n! When you simplify one side of the equation, you get 5t^4 - 27^2 + 24 = 0. This ends up being a quartic equation, and unfortunately, this is not covered in the Junior Cert Maths course (for your interest, this is the answer: x = 2.0683262276067467 or x = 1.0592575778317774 or x = -1.0592575778317774 or x = -2.0683262276067467).

      Double-check your equation and try and make sure you have it written correctly.

    2. avatar image

      Dazzla16

      Hi djsutt0n! When you simplify one side of the equation, you get 5t^4 - 27t^2 + 24 = 0. This ends up being a quartic equation, and unfortunately, this is not covered in the Junior Cert Maths course (for your interest, this is the answer: x = 2.0683262276067467 or x = 1.0592575778317774 or x = -1.0592575778317774 or x = -2.0683262276067467).

      Double-check your equation and try and make sure you have it written correctly.

      (Ignore my first post, I made a slight mistake.)

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      djsutt0n

      Thanks a lot but this came up in my mocks?

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      Dazzla16

      Are you sure 5(t^2-2) was to be squared?

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      Roberto Mane

      Use the minus B formula to solve that question,you must've got the same mock as me...I remember that question.

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      Dazzla16

      @Roberto Mane please call it the quadratic formula.

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      Dazzla16

      Also, @Roberto Mane do you know if 5(t^2-2) is to be squared? Can you rewrite the question (djsutt0n may do this instead) so that it is easier to understand. I don't know whether 5(t^2-2) is to be squared, or only (t^2-2) is to be squared. Use brackets if you need to.

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      Me

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