Answer:
see explanation
Step-by-step explanation:
She has taken the factor 2 out of the square root incorrectly
using the rule of radicals
[tex]\sqrt{ab}[/tex] ⇔ [tex]\sqrt{a}[/tex] × [tex]\sqrt{b}[/tex], then
[tex]\sqrt{50}[/tex]
= [tex]\sqrt{2(25)}[/tex]
= [tex]\sqrt{2}[/tex] × [tex]\sqrt{25}[/tex]
= [tex]\sqrt{2}[/tex] × 5 = 5[tex]\sqrt{2}[/tex] ≈ 7.07
