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Jaiganesh

· started a discussion

· 1 Months ago

question is incorrect (Question: 100985.0 )

instead of 2 * squarerootOf(8) it is simply given as squareroot of 8.
(Or) 2 should be omitted in front of the square root of 392.

Question:

DIRECTIONS: What  value will come in place of question mark (?)?

 

(2\(\sqrt{392}\)  – 21) + (\(\sqrt{8}\)  – 7)2 = (?)2

Options:
A) 4
B) -4
C) 12
D) 2
E) 6
Solution:

kanhaiya jha

· commented

· 1 Months ago

Good :)

Jaiganesh

· commented

· 1 Months ago

yeah i understood now how it comes

kanhaiya jha

· commented

· 1 Months ago

Not at all because its in bracket i.e.(square root of 8 - 7)^2 ..


so, first need to simplify it by using whole square of a-b formula then next....



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