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Consider whole equation as x.
So, you can see that
x = √(2 - x)
x² = 2 - x
x² + x - 2 = 0
x² + 2x - x - 2 = 0
x(x + 2) - 1(x + 2) = 0
(x + 2)(x - 1) = 0
So, x = -2, 1.
But square root can't have negative value.
So, its answer is 1.
Thank you.
So, you can see that
x = √(2 - x)
x² = 2 - x
x² + x - 2 = 0
x² + 2x - x - 2 = 0
x(x + 2) - 1(x + 2) = 0
(x + 2)(x - 1) = 0
So, x = -2, 1.
But square root can't have negative value.
So, its answer is 1.
Thank you.
assingh:
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