Odpowiedź:
a)
(√3+1)(√3-2)+(√3+2(√3-2)-(√3+3)(√3-3)=
3-2+3-4-3-9= -12
b)
(1-2√5)(1+2√5)+(1-3√5)(1+3√5)-(1-4√5)(1+4√5)=
1-20+1-45-1-80=-144
c)
(2√2-1)²-(2√2-1)(1+2√2)-(2√2+1)²=
8+1-2√2-2√2-8+1=9-2√2-2√2-8+1=2-2√2-2√2=
2-4√2
