Question

4 root 10 minus 2 root 40​

Answer 1

Answer:

Step-by-step explanation:

Answer 2

Answer:

$4 \sqrt{10 } - 2 \sqrt{40 }$

$4 \sqrt{10} - 2 \sqrt{2 \times 2 \times 10}$

$4 \sqrt{10} - 2 \times 2 \sqrt{10}$

$4 \sqrt{10} - 4 \sqrt{10}$

$= 0$