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