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If there is only the radical, sqrt(b), in the denominator, the form of the fraction is sqrt(b)/sqrt(b).If the denominator is of the form a + sqrt(b) then the form of the fraction is [a - sqrt(b)]/[a - sqrt(b)].It is also possible to use [-a + sqrt(b)]/[-a + sqrt(b)], and this form may be preferred is a^2 < b.
An irrational number cannot be expressed in form of a/b.
√a / √b = √(a/b)
Rational Number: Any number which can be expressed in the form of a/b(a & b are integers; b is not equal to 0). 25.75232 = 2575232/100000(which is in the form of a/b)
A scientific number is expressed in the form a*10^b where where a is a number written in decimal form and 1