$\sqrt(25+25 )$ =
A)5$\sqrt2$
B)10$\sqrt2$
C)25$\sqrt2$
D)10
E)25

Question

Quizplus · Accepted Answer

Do not add 25 and 25. Think how to take some figures out of square root symbol. You notice 25 can be taken common
$\sqrt(25+25 )$ =$\sqrt(25)(1+1 ) $= 5$\sqrt(1+1 )$ = 5$\sqrt2$
Key takeaway: You are not expected to know the square root of the numbers like 50 So look for a way to attack such problems other way than straight arithmetic calculation. You should be able to find some factors or application of simple algebraic formulae.

(25+25)\sqrt(25+25 )(​25+25) = A)5 2\sqrt22​ B)10 2\sqrt22​ C)25 2\sqrt22​ D)10 E)25

$\sqrt(25+25 )$ =
A)5 $\sqrt2$ B)10 $\sqrt2$ C)25 $\sqrt2$ D)10
E)25