Write the Lowest Rationalising Factor of : √18 - √50

Write the lowest rationalising factor of : √18 - √50

Sum

√18 - √50
√18 - √50 = `sqrt( 2 xx 3 xx 3 ) - sqrt( 5 xx 5 xx 2 )`
= 3√2 - 5√2 = -2√2
∴ lowest rationalizing factor is √2

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Rationalisation of Surds

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Chapter 1: Rational and Irrational Numbers - Exercise 1 (C) [Page 21]

Chapter 1 Rational and Irrational Numbers
Exercise 1 (C) | Q 2.5 | Page 21

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