Q.1. (8+3√21)⅓ + (8-3√21)⅓ = ?

1.	Q.1. (8+3√21)⅓ + (8-3√21)⅓ = ?
Answer» Formula (a+b)(a-b) =a Square -b square Then, 8square -3√21square = 64-3*3=64-9=55 (8⅓+3×21½×⅓)+ (8⅓-3×21½×⅓). (2+21^1/6)+(2-21^1/6). 2+21^1/6+2-21^1/6. 2+2. 4

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