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Nick88888888

  • one year ago

Solve by using the Quadratic Formula: 5x2 - 2x - 3 = 0 Can someone show me how to do this step by step?

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  1. kropot72
    • one year ago
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    Do you know the formula for solving any quadratic?

  2. Nick88888888
    • one year ago
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    errr zero-product property?

  3. kropot72
    • one year ago
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    \[\large x=\frac{-b \pm \sqrt{b^{2}-4ac}}{2a}\] for quadratic \[\large ax^{2}+bx+c\]

  4. kropot72
    • one year ago
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    For your question: a = 5, b = -2, c = -3 Just plug the values into the formula.

  5. Nick88888888
    • one year ago
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    Ok so |dw:1435564026199:dw|

  6. kropot72
    • one year ago
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    @Nick88888888 Can you do that?

  7. Nick88888888
    • one year ago
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    @kropot72 Did i do that correctly or did i make a mistake in the order i solved things?

  8. kropot72
    • one year ago
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    \[\large x=\frac{-(-2) \pm \sqrt{4-4(-3\times5)}}{10}\]

  9. kropot72
    • one year ago
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    \[\large =\frac{2\pm \sqrt{(4+60)}}{10}=you\ can\ calculate\]

  10. Nick88888888
    • one year ago
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    2+√(4+60)/10=2.8? 2-√(4+60)/10=1.2?

  11. Nick88888888
    • one year ago
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    wait no

  12. Nick88888888
    • one year ago
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    2-√(4+60)/10=-0.6 2+√(4+60)/10=1

  13. kropot72
    • one year ago
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    Correct. Good work.

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