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nerdyotter

  • one year ago

What is AB?

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  1. nerdyotter
    • one year ago
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  2. mathstudent55
    • one year ago
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    |dw:1439513047942:dw|

  3. mathstudent55
    • one year ago
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    \(\Large a^2 = (b + c)c\)

  4. nerdyotter
    • one year ago
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    @mathstudent55 I got an answer of -6.6 repeating. Which is pretty wrong, to say the least. What could I have done wrong?

  5. anonymous
    • one year ago
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    @mathstudent55 you are wrong with the formula, with that drawing then the formula is \[a ^{2}=b(b+c)\] so with the sides a=8, b=x and c=12 then \[8^{2}=x(x+12)\] \[64=x ^{2}+12x\] \[x ^{2}+12x-64=0\] by factoring we get \[(x+16)(x-4)=0\] so possible solutions are x= -16 or x= 4, but x cannot be negative, so the only valid solution is x=AB=4

  6. nerdyotter
    • one year ago
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    @Natriumhydrid Thank you so much!

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