Answers

2016-04-14T08:37:23+05:30
(2√5+3√2)² 
(a+b)² = a²+2ab + b²

(2√5)²+2*√5*3√2+  (3√2)²
20+6√10+18
38+6√10
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2016-04-14T11:54:39+05:30
(2 \sqrt{5} +3 \sqrt{2} )² 

We know that          (a+b)² = a² + b² +2ab

(2 \sqrt{5} )² +  (3 \sqrt{2} )²  + 2×2 \sqrt{5} ×3 \sqrt{2}

20 + 18  + 12 \sqrt{10}

38+12 \sqrt{10}
0