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Sunshine447 Group Title

Solve the quadratic equation. 8x^2 + 16x + 8 = 0

  • 2 years ago
  • 2 years ago

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  1. Sunshine447 Group Title
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    I know how to do this the "plug and play" method, but can someone teach me how to do it when it;s NOT multiple choice? Thanks!

    • 2 years ago
  2. CJVelasco Group Title
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    take out 8 and it gives you 8(x^2+2x+1)

    • 2 years ago
  3. Sunshine447 Group Title
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    okay........

    • 2 years ago
  4. CJVelasco Group Title
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    factor out x^2+2x+1

    • 2 years ago
  5. Sunshine447 Group Title
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    how?

    • 2 years ago
  6. CJVelasco Group Title
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    (x+___)(x+___)

    • 2 years ago
  7. CJVelasco Group Title
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    think of two numbers that gives you 2 ehrn you add and gives you 1 when you multiply

    • 2 years ago
  8. Sunshine447 Group Title
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    1 and 1

    • 2 years ago
  9. CJVelasco Group Title
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    good then, thats 8(x+1)(x+1)

    • 2 years ago
  10. Sunshine447 Group Title
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    okay

    • 2 years ago
  11. CJVelasco Group Title
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    divide it by 8 to eliminate 8

    • 2 years ago
  12. CJVelasco Group Title
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    then it will be (x+1)(x+1)=0

    • 2 years ago
  13. Sunshine447 Group Title
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    okay

    • 2 years ago
  14. CJVelasco Group Title
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    so x=-1

    • 2 years ago
  15. Sunshine447 Group Title
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    because x+1=0?

    • 2 years ago
  16. CJVelasco Group Title
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    yep

    • 2 years ago
  17. Sunshine447 Group Title
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    ohhhh ok thanks!

    • 2 years ago
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