Question

write whether
$\frac{2 \sqrt{45} }{2 \sqrt{5} } + 3 \sqrt{20}$
on simplification gives an irrational or rational number​

Answer 1

I  think it will help

2√45+3√20/2√5

2√3×3×5 + 3√2×2×5/2√5

2×3√5 + 3×2√5/2√5

6√5 + 6√5/2√5

12√5/2√5

6

hence it is rational number

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