Question

PLZ HELP ill GIVE BRAINIESt!!!!20 Points

Answer 1

She made her mistake at the first step. To simplify a radical, you would find two numbers that multiply by each other to get your original number (under the radical) and have one of the number be a perfect square.

Her reasoning is wrong because 10*10 is not $\sqrt{50}$. Had she been correct, her answer should have been able to be squared to equal $\sqrt{50}$

In other words, she should have done $\sqrt{25*2}= \sqrt{25} * \sqrt{2}=5 \sqrt{2}$
(We used 25 because 25 is a perfect square, 5*5=25).

:)