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title="x^{2} +(7\sqrt{3} )^{2} =(2x)^{2}" alt="x^{2} +(7\sqrt{3} )^{2} =(2x)^{2}" align="absmiddle" class="latex-formula">
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Answer:
Step-by-step explanation:
We're going to have to work backwards.
The sum of 4 and k is .
Half is simply that divided by 2.
Now, we'll subtract 8 from it.
Bam!