please solve it with steps and don't need direct answer.
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You have to just rationalise the denominator
for doing so
multiply the numerator and denominator by it s conjugate ( 3 + root7)
hence X = 3 + root 7
Substitute it in condition you will get 7 as answer
for doing so
multiply the numerator and denominator by it s conjugate ( 3 + root7)
hence X = 3 + root 7
Substitute it in condition you will get 7 as answer
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