( $\sqrt5$ +$\sqrt5$)2 =
A)5
B)10
C)20
D)25
E)50

Question

Quizplus · Accepted Answer

Use simple algebra rules ( $\sqrt5$ + $\sqrt5$ )2 = ($\sqrt5$) 2 (1 + 1) 2 = 5 x 4 =20
Key takeaway: The square root of the numbers like $\sqrt5$ is a decimal number and expression would require long calculation if we put in the given. 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.

5\sqrt55​ 5\sqrt55​ )2 = A)5 B)10 C)20 D)25 E)50

$\sqrt5$ $\sqrt5$ )2 =
A)5
B)10
C)20
D)25
E)50