1.

If x = 7 + 2√10, then what is the value of √x – 1/√x?

A. 2(√5 + 2√2)/3
B. 2(√5 - 2√2)/3
C. -2(√5 + 2√2)/3
D. 2(2√2 - √5)/3
Answer» B. 2(√5 - 2√2)/3


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