AIR MATH

Math Question

Which equation is equivalent to \( \sqrt{x^{2}+81}=x+10 ? \)
\( x+9=x+10 \)
\( x+9=x^{2}+20 x+100 \)
\( x^{2}+81=x^{2}+100 \)
\( x^{2}+81=x^{2}+20 x+100 \)

Solution

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