?
$${\left( {15} \right)^2} + {\left( {18} \right)^2} - 20 = \sqrt ? $$
Answer & Solution
Correct Answer:
Option
D
$$\eqalign{
& {\text{Let, }} \cr
& {\left( {15} \right)^2} + {\left( {18} \right)^2} - 20 = \sqrt x \cr
& {\text{Then, }} \cr
& \sqrt x = 225 + 324 - 20 \cr
& \Leftrightarrow x = {\left( {529} \right)^2} \cr
& \Leftrightarrow x = 279841 \cr} $$
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