Answer: 4/5 * 7^1/2 ==> 1st option
Explanation:
3(7/25)^1/2-(28/25)^1/2+(63/25)^1/2=
3(7)^1/2 / 5 -(4*7)^1/2 / 5 +(9*7)^1/2 / 5=
3(7)^1/2 / 5 -2(7)^1/2 / 5 +3(7)^1/2 / 5=
(3-2+3)(7^1/2 / 5)=
4(7^1/2 / 5)=4/5 * 7^1/2 ==> 1st option
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