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Find the value of 𝑓 of square root two given the function 𝑓 of 𝑥 equals 𝑥 squared plus square root two 𝑥.
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So in order to find the value of 𝑓 of square root two, we need to plug in square root two for 𝑥.
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So we are replacing the 𝑥s with square root two, and now we evaluate.
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Square root two squared is two, and square root two times square root two is also two, and two plus two equals four.