What is the value of the expression $380^{1/2} - 25^{1/2}$ ?

Correct answer marked below

4\sqrt{5}

5\sqrt{3}

10\sqrt{5}

Correct

12\sqrt{3}

20\sqrt{5}

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Comments

BeanJun 6

wait how do you deal with the 80 under the root? i broke it into 16 and 5, that felt right

YashJun 20

yeah 16*5 works since 16 is a perfect square, so it comes out nice

AuroraApr 20

lol i picked A at first because i forgot to multiply by the 3 in front smh

What this question tests

Your handling of square and higher roots, including simplifying radicals.

Forgetting the ± when taking a square root to solve an equation, or assuming √(a²) = a.