Question

4√5 + 5√5 is equal to: a) 9√5 b) 9√10 c) 5√10 d) 7√5

Answer 1

Answer:

it's answer is 9√5...... because=(4√5+5√5)=9√5

Answer 2

Answer:

$4\sqrt{5} + 5\sqrt{5}= 9\sqrt{5}$

Step-by-step explanation:

Given $4\sqrt{5} + 5\sqrt{5}$

Both terms contain $\sqrt{5}$,

 so taking  $\sqrt{5}$ common from both the terms,

                    $4\sqrt{5} + 5\sqrt{5}=(4+ 5)\sqrt{5}$

                                       $=9\sqrt{5}$

Therefore,  $4\sqrt{5} + 5\sqrt{5}= 9\sqrt{5}$