September 2018 1 16 Report

1.Oblicz wartość wyrażenia:

a) (x-y) (x+y) + (x+2y) (x-2y) dla x= \sqrt{2}\\ y=1-\sqrt{3}

b)(\sqrt{5}\ +x)^{2}\ -\ (\sqrt{5}\ -\ x)^{2}\ \ dla\ x=\sqrt{5}\ -\ 1

2.Usuń niewymierność z mianownika:

a)\ \frac{1}{2\sqrt{5}}\\ b)\ \frac{\sqrt{3}-1}{4-2\sqrt{3}}


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