Question

solve this (ques 4 and ques 9)

Answer 1

Answer:

Step-by-step explanation:

Answer 2

$5 \sqrt{18} + 7 \sqrt{50} - 10 \sqrt{8}$

$= > 5 \sqrt{2 \times 3 \times 3} + 7 \sqrt{5 \times 5 \times 2} - 10 \sqrt{2 \times 2 \times 2}$

$= > 15 \sqrt{2} + 35 \sqrt{2} - 20 \sqrt{2}$

$= > (15 + 35 - 20) \sqrt{2}$

$= > 30 \sqrt{2} \: \: {ans}$

Que vii,

$4 \sqrt{ \frac{3}{5} } + \frac{1}{2} \sqrt{ \frac{27}{5} } + \sqrt{ \frac{3}{20} }$

$= > 4 \sqrt{ \frac{3}{5} } + \frac{1}{2} \sqrt{ \frac{3 \times 3 \times 3}{5} } + \sqrt{ \frac{3}{2 \times 2 \times 5} }$

$= > 4 \sqrt{ \frac{3}{5} } + \frac{3}{2} \sqrt{ \frac{3}{5} } + \frac{1}{2} \sqrt{ \frac{3}{5} }$

$= >( 4 + \frac{3}{2} + \frac{1}{2} ) \sqrt{ \frac{3}{5} }$

$= > ( \frac{8 + 3 + 1}{2} ) \sqrt{ \frac{3}{5} }$

$= > \frac{11}{2} \sqrt{ \frac{3}{5} }$

Then, you can also rationalize it.

Thanks for letting me help you.