Răspunsuri

2014-07-23T14:28:29+03:00
1.
3√2/√3=3√2*√3/3=3√6/3=√6
2.
7/15*(-5)/28*21/8=7/32
3
√125=5√5
5√5-√5=4√5
4.
√(4√5-8)²=modul din 4√5-8
4(√5-2)
sau 8-4√5=4(2-√5)