Question

simplify the expressions : 4√21 ÷2√7​

Answer 1

4√21

2√7

2√3 is your answer

Answer 2

Answer:

2√3

Step-by-step explanation:

$4 \sqrt{21} \div 2 \sqrt{7}$

$= 4 \sqrt{3 \times 7)} \div 2 \sqrt{7}$

$= \frac{4 \sqrt{3 \times 7} }{2 \sqrt{7} }$

$= \frac{4 \times \sqrt{3} \times \sqrt{7} }{2 \times \sqrt{7} }$

• 4 ÷ 2 = 2
• √7 ÷ √7 = 1

$= 2 \sqrt{3}$

2√3 is the answer.