Răspuns:
(√2-1)²=√2²-2√2*1+1²=
2-2√2+1=3-2√2
-------------------------
(√5-2)²=√5²-2√5*2+4=
5-4√5+4=
9-4√5
------------------------------------
(2-√3)²=2²-2*2*√3+√3²=
4-4√3+3=
7-4√3
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(7-√6)²=7²-2*7*√6+√6²
49-14√6+6=
55-14√6
Explicație pas cu pas:
