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Sunshine447

  • 3 years ago

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

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  1. Sunshine447
    • 3 years ago
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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. CJVelasco
    • 3 years ago
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    take out 8 and it gives you 8(x^2+2x+1)

  3. Sunshine447
    • 3 years ago
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    okay........

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

  5. Sunshine447
    • 3 years ago
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    how?

  6. CJVelasco
    • 3 years ago
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    (x+___)(x+___)

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

  8. Sunshine447
    • 3 years ago
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    1 and 1

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

  10. Sunshine447
    • 3 years ago
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    okay

  11. CJVelasco
    • 3 years ago
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    divide it by 8 to eliminate 8

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

  13. Sunshine447
    • 3 years ago
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    okay

  14. CJVelasco
    • 3 years ago
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    so x=-1

  15. Sunshine447
    • 3 years ago
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    because x+1=0?

  16. CJVelasco
    • 3 years ago
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    yep

  17. Sunshine447
    • 3 years ago
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    ohhhh ok thanks!

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