Question

write whether 2root45+3roo20 by2root5 on simplification gives a rational or a irrational number

Answer 1

Answer:

It gives a rational number as,

Step-by-step explanation:

(2√45 + 3√20) / 2√5

= 2√45 / 2√5 + 3√20 / 2√5

= √9 + 3/2 * 2

= 3 + 3

= 6 which is rational

Answer 2

Answer:

2root45/2root5+3root20/2root5

root9+3/2×2

3+3=6.