Question

i need some help

Answer 1

Use pythagoras theorem.
WX = root of 7^2 + 7^2
= root of 49 + 49
= root of 98
You can convert this into a mixed surd.

Answer 2

once i do that do i add them all together ??

Answer 3

Prime factor 98.
Then take out each pair of numbers and then keep the unpaired ones inside the radical.

Answer 4

its b

Answer 5

\[\sqrt{98} = \sqrt{2 \times 7\times 7} = 7\sqrt{2}\]