SOLUTION: What sort of approach should i do, when im faced with a question such as: Given that {{{ (a-sqrt(b))^2=(a^2+b)-2a*sqrt(b) }}}, then {{{ sqrt(28+10sqrt(3)) }}} is equal to: A)

Question 1021600: What sort of approach should i do, when im faced with a question such as:
Given that , then is equal to:
A)
B)
C)
D)
E)
What is the answer between these multiple choices, and how may i get to that answer?
Answer by robertb(5830) (Show Source): You can put this solution on YOUR website!
You would be better off if you considered .
==> .
This implies
2a = 10 and
==> a = 5 and ==> b = 3
Therefore,
.
Taking square roots of both sides of the last equation, we get
.
But , so now you know the answer!

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