Evaluate
2\left(y-\sqrt{14}\right)
Differentiate w.r.t. y
2
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2y-\sqrt{10+4}-\sqrt{14}
Add 1 and 9 to get 10.
2y-\sqrt{14}-\sqrt{14}
Add 10 and 4 to get 14.
2y-2\sqrt{14}
Combine -\sqrt{14} and -\sqrt{14} to get -2\sqrt{14}.
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