Question

7 supra 2 radical din 5 + 7 supra 3 radical din 5 -7 supra 6radical din 5+ 7 supra 5 radical din 5

Answer 1

7/2√5 + 7/3√5 -7/6√5+ 7/5√5 =
=7√5/(2×5) + 7√5/(3×5) -7√5/(6×5)+ 7√5/(5×5) =
=(15×7√5 +10×7√5 -5×7√5+ 6×7√5)/150 =
=(105√5 +70√5 -35√5+42√5)/150 =
=182√5/150 =
=91√5/75