Question

What is 7rad5 exapanded

Answer 1

5[3√2 - 7√5] / [(3√2 + 7√5)(3√2 - 7√5)] 
5[3√2 - 7√5] / [9*2 - 49*5] 
5[3√2 - 7√5] / [18 - 245] 
5[3√2 - 7√5] / -227 OR 
(15√2 - 35√5) / -227 

Answer 2

If you mean in decimal form then it would be 15.65