Question

simplify the following a) √45-3√20+4√5. b)√24/8+√54/9​

Answer 1

Answer:

=

3×3×5

−3

2×2×5

+4

5

=3

5

−6

5

+4

5

=

5

So, (

5

)

2

=5

Answer 2

Step-by-step explanation:

$\bf \underline{Solution-}$

$\sf{ \frac{ \sqrt{24} }{8} + \frac{ \sqrt{54} }{9} }$

$\sf{ = \frac{ \sqrt{4 \times 6} }{8} + \frac{ \sqrt{9 \times 6} }{9} }$

$\sf{ = \frac{2 \sqrt{6} }{8} + \frac{3 \sqrt{6} }{9} }$

$\sf{ = \frac{ \sqrt{6} }{4} + \frac{ \sqrt{6} }{3} }$

$\sf{ = \sqrt{6} \bigg( \frac{1}{4} + \frac{1}{3} \bigg) }$

$\sf{ = \sqrt{6} \bigg( \frac{3 + 4}{12} \bigg) }$

$\sf{ = \frac{7 \sqrt{6} }{12} \: \bf{Ans. }}$