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anonymous

  • 5 years ago

Using quadractic formula, please solve for me, x +11x-12=0

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  1. anonymous
    • 5 years ago
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    it should be x2+11x-12=0

  2. anonymous
    • 5 years ago
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    u can solve this by factorising

  3. amistre64
    • 5 years ago
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    the quad formula is simply plug and play; why would you need someone to do it for you?

  4. anonymous
    • 5 years ago
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    gernic rectangels

  5. anonymous
    • 5 years ago
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    I wanna make sure i'm coming up with the right answer Amistre

  6. amistre64
    • 5 years ago
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    whats your answer then? and we can check it ;)

  7. anonymous
    • 5 years ago
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    -11 13squared

  8. anonymous
    • 5 years ago
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    oops

  9. amistre64
    • 5 years ago
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    it actually checks itself ; plug in the x values you find and see if they make it equal 0

  10. anonymous
    • 5 years ago
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    oh ok:/

  11. amistre64
    • 5 years ago
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    you should come up with x = -12 and 1, if i see it right

  12. anonymous
    • 5 years ago
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    yep amis

  13. amistre64
    • 5 years ago
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    -b sqrt(b^2 -4ac) -- +- ------------- 2a 2a

  14. amistre64
    • 5 years ago
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    -11 sqrt(121 +48) ---- +- ------------ 2 2

  15. amistre64
    • 5 years ago
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    -11 +- sqrt(169) -11 +- 13 --------------- = ---------- 2 2 -24/2 = -12 2/2 = 1

  16. anonymous
    • 5 years ago
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    Thanks Amis don't know where i went wrong

  17. amistre64
    • 5 years ago
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    you were close; you just forgot the "/2" and also to make sure that you use the "+-" and not just the a "+" for the sqrt

  18. anonymous
    • 5 years ago
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    Oh ok

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