32
23
49
94
Correct answer is D
√x - √(x−2) - 1 = 0
= √x - √(x−2) = 1
= (√x - √(x−2))2 = 1
= x - 2 √x(x−2) + x -2 = 1
= (2x - 3)2 = [2 √x(x−4)]2
= 4x2 - 12x + 9
= 4(x2 - 2x)
= 4x2 - 12x + 9
= 4x2 - 8x
4x = 9
x = 94
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