Jawabanmu

2014-08-27T22:30:57+07:00
=2/7 √49 ×√2 - 5/3√9 ×√2+2/5√25×√3
=2/7×7√2-5/3×3√2+2/5×5√3
=2√2-5√2+2√3
= -3√2+2/3