\(A=11\sqrt{x+5}\left(đk:x\ge-5\right)\)
\(A=6\Leftrightarrow11\sqrt{x+5}=6\)
\(\Leftrightarrow\sqrt{x+5}=\dfrac{6}{11}\Leftrightarrow x+5=\dfrac{36}{121}\)
\(\Leftrightarrow x=-\dfrac{569}{121}\left(tm\right)\)
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ĐKXĐ: \(x\ge0\)
\(A=11\sqrt{x}+5=6\)
\(\Leftrightarrow11\sqrt{x}=1\Leftrightarrow x=\dfrac{1}{11}\)
\(\Leftrightarrow x=\dfrac{1}{121}\left(tm\right)\)
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