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LeAnn01Xxx

  • one year ago

The quadratic formula is used to solve an equation and the result is 2±√36/6. The solution set for the equation is A. {-2/3, 4/3} B. {1, 3} C. {2}

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  1. e.mccormick
    • one year ago
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    Well, if you simplify that, what do you get?

  2. LeAnn01Xxx
    • one year ago
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    I have no idea how to simplify this..

  3. e.mccormick
    • one year ago
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    Well, what is the square root of 36?

  4. LeAnn01Xxx
    • one year ago
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    6 im pretty sure

  5. e.mccormick
    • one year ago
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    \(2\pm \dfrac{\sqrt{36}}{6}\) \(2\pm \dfrac{6}{6}\) OK, what is next?

  6. LeAnn01Xxx
    • one year ago
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    Uh im not really sure. Im really bad at math and failed it, so..

  7. e.mccormick
    • one year ago
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    I am assuming the first... but you might have meant: \(\dfrac{2\pm \sqrt{36}}{6}\) It is a little unclear which by how it is written. 2±√(36)/6 = \(2\pm \dfrac{\sqrt{36}}{6}\) (2±√36)/6 = \(\dfrac{2\pm \sqrt{36}}{6}\) In either case, the first thing is getting thr square root of 36, which is 6.

  8. LeAnn01Xxx
    • one year ago
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    Ok, I still don't understand how to get the answer.

  9. e.mccormick
    • one year ago
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    It is simplification. Order of operations. PEMDAS Parenthesis Exponents Multiplication and Division Addition and Subtraction Now, the square root is related to exponents, so pretty high up there.

  10. LeAnn01Xxx
    • one year ago
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    I don't get this..

  11. LeAnn01Xxx
    • one year ago
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    I got it. It was A.

  12. e.mccormick
    • one year ago
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    1+2*3 Because of the order of operations, I multiply first: 1+6 7 But if it was: (1+2)*3 The paren make the addition happen first: 3*3 9 The order changes the answer. That is why it is a key concept. All this question is saying is that you need to use the order of operations to simplify the result. So the only other issue is exactly how it is written, which changes it a lot.

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