Question

3root125+7root45-11root20​

Answer 1

Answer:

3√45= 3√9×5= 3×3√5=9√5

√125=√25×5=5√5

√200= √100×2= 10√2

√50= √25×2= 5√2

Here,

9√5-5√5+10√2-5√2

= 4√5+5√2

Answer 2

Answer:

$3 \sqrt{125} + 7 \sqrt{45} - 11 \sqrt{20} \\ 15 \sqrt{5} + 21 \sqrt{5} - 22 \sqrt{5} \\ 14 \sqrt{5}$