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when sqrt((-s)^2+(-8)^2)=10 why is s=6 and -6 and not 2

 Dec 12, 2020
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\(When \sqrt{(-s)^2+(-8)^2}=10\ why\ is\ s=6\ and -6\ and\ not\ 2? \)

 

Hello Guest!

 

\((-s)^2+(-8)^2=100\\ -s=\pm \sqrt{100-64}\\ -s=\pm6\)

\(s_1=6\\ s_2=-6\)         therefore!

laugh  !

 Dec 12, 2020

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