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When $\frac{1}{4 + 15}$ is rationalised, the numerator becomes:

Class 9Rationalising the DenominatorNumber Systems

A $4 - 15$
B $4 + 15$
C $15 - 4$
D1

Step-by-Step Solution

Multiply by

(4 - 15) : (4 - 15) / ((4)^{2} - (15)^{2}) = \frac{4 - 15}{16 - 15} = 4 - 15

. Numerator is

4 - 15

.

Answer: A)

4 - 15

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