Question

simplify the following surds 168​

Answer 1

Answer:

$\sqrt{168} = \sqrt{4 \times 42} \\ = 2 \sqrt{42}$

Answer 2

$\sqrt{168} = \sqrt{2×2×2×3×7}\\</p><p> = \sqrt{4×42}\\</p><p> = 2\sqrt{42}$