Question

1. The value of ✓20 x ✓5 is
(a) 10
(b) 2✓5
(c) 20✓5​

Answer 1

Answer:

10 is the answer

Step-by-step explanation:

As root20 X root5

= root100

= 10...........

Keep learning maths...

Answer 2

✓ Question :

Find the value of √20 * √5

✓ Answer :

$\sqrt{20} = \sqrt{4 \times 5}$

$= \sqrt{4} \times \sqrt{5}$

$\sqrt{20} = 2 \sqrt{5}$

$\sqrt{20} \times \sqrt{5} = 2 \times \sqrt{5} \times \sqrt{5}$

$= 2 \times 5 = 10$

Hence Option a is the answer !!

__________________________

when a number is multiplied by that same number we call it as square number. Eg ,

$7 \times 7 = {7}^{2} = 49$

$\sqrt{49} = 7$