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write whether 2 root 45 +3 root 20 by 2 root 5 on simplification gives a rational or irrational no.

Posted by Ishwarpreet Kaur 7 years, 6 months ago

CBSE > Class 10 > Mathematics

2 answers

Sonali Aggarwal 7 years, 6 months ago

(2√45 + 3√20 )/2√5 = (2*3√5 + 3*2√5)/2√5= 12√5/2√5= 6 , so it gives a rational number

0Thank You

Anjali Yadav 7 years, 6 months ago

Irrational

0Thank You

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CBSE > Class 10 > Mathematics