Question

1). a) √12-3√18√48-√72+√300-√800=
b)║3-√2║-║2-√5║+║2+√5║-║1-√2║
║= modul
dau coroana +15 pct

Answer 1

[tex]a)2 \sqrt{3} -3*3 \sqrt{2} *4 \sqrt{3} - 6\sqrt{2} +10 \sqrt{3} -20 \sqrt{2} = \\ 2 \sqrt{3} -36 \sqrt{6} - 6\sqrt{2} +10 \sqrt{3} -20 \sqrt{2} = \\ =12 \sqrt{3} -36 \sqrt{6}-26 \sqrt{2} \\b)  |3- \sqrt{2} | -|2- \sqrt{5}|+|2+\sqrt{5}|-|1- \sqrt{2} |= \\ =3- \sqrt{2} - \sqrt{5} - \sqrt{2} +2 +\sqrt{5} - \sqrt{2} -1= \\ =4- 3\sqrt{2} [/tex]