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amid [387]
3 years ago
8

What is

a1" title="f(4) = \sqrt{x {}^{2} } - 5" alt="f(4) = \sqrt{x {}^{2} } - 5" align="absmiddle" class="latex-formula">
someone help me please​
Mathematics
1 answer:
dexar [7]3 years ago
3 0
<h3>Solution:</h3>

f(x) =  \sqrt{ {x}^{2} }  - 5 \\  =  > f(4) =  \sqrt{ {(4)}^{2} } - 5 \\   \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  =  \sqrt{16 }   - 5 \\  =  4 - 5 \\  =  - 1 \\ or \\  =  - 4 - 5 \\  =  - 9

<h3>Answer:</h3>

-1 or -9

<h3>Hope it helps</h3>

ray4918 here to help

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