# Write the Rationalisation Factor of 7 − 3 √ 5 . - Mathematics

Write the rationalisation factor of $7 - 3\sqrt{5}$.

#### Solution

The rationalizing factor of a+sqrtb  is a- sqrtb . Hence the rationalizing factor of 7-3sqrt5  is 7+3sqrt5.

Concept: Operations on Real Numbers
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#### APPEARS IN

RD Sharma Mathematics for Class 9
Chapter 3 Rationalisation
Exercise 3.3 | Q 3 | Page 16

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