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Garrett Shields

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  • Garrett Shields commented,

    Your equation needs to equal zero on one side before the quadratic equation will work. It has to do with the way the quadratic equation is derived, and I don't have time or tools to provide the det...

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  • Garrett Shields commented,

    They have simplified the square root. Here are the missing details: sqrt(88)=sqrt(4x22)=sqrt(4)sqrt(22)=2sqrt(22). You can do this because the square root is really an exponent (it's the 1/2 power...

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