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-------=-----------
√2 2
b) (2+√2)*√2 2√2+2
-------------------= ----------------------= √2+1
2 2
a)(3-2√5)*√5 3√5-10
-------------------=----------------
10 10
d) 7√3*(1+√2) 7√3+7√6
----------------------=----------------------= -7√3-7√6
1-2 -1