If a = 64 and b = 289, then the value of (√√a

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a = 64 and b = 289
∴ √a = √64 = 8 and
√b = √289 = 17
∴ (√√a + √b − √√b − √a)^1/2
= (√8 + 17 − √17 − 8)^1/2
= (√25 − √9)^1/2
= (5 − 3)^1/2
= (2)^1/2