Write the rationalize factor Of * 1/(sqrt(7) - sqrt(4))
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Rationalising factor of 1/√7-√3
so,
(1/√7-√3)(√7+√3/√7+√3)
=√7+√3/(√7)^2-(√3)^2
=√7+√3/7-3
=√7+√3/4
Therefore the rationalising factor of 1/√7-√3 is √7+√3/4
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