Calculați, după ce ați scos factorii de sub radical:
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[tex]a)( \sqrt{450} - \sqrt{200} ) - ( \sqrt{1250} - \sqrt{1800} )[/tex]
[tex](15 \sqrt{2} - 10 \sqrt{2} ) - (25 \sqrt{2} - 30 \sqrt{2} )[/tex]
[tex](5 \sqrt{2} ) - ( - 5 \sqrt{2} )[/tex]
[tex]5 \sqrt{2} + 5 \sqrt{2} [/tex]
[tex]10 \sqrt{2} [/tex]
[tex]b) \sqrt{1805} - ( \sqrt{1620} - \sqrt{845} ) - 720[/tex]
[tex]19 \sqrt{5} - (18 \sqrt{5} - 13\sqrt{5} ) - 720[/tex]
[tex]19 \sqrt{5} - 5 \sqrt{5} - 720[/tex]
[tex]14 \sqrt{5} - 720[/tex]
[tex] c)\sqrt{160} - ( \sqrt{810} - \sqrt{9610} + \sqrt{6760} )[/tex]
[tex]4 \sqrt{10} \div (9 \sqrt{10} - 31 \sqrt{10} + 26 \sqrt{10} )[/tex]
[tex]4 \sqrt{10} - 4 \sqrt{10} [/tex]
[tex]0[/tex]
[tex]d) \sqrt{4375} - ( \sqrt{3087} + \sqrt{4732} - \sqrt{2268} )[/tex]
[tex]25\sqrt{7} - (21 \sqrt{7} + 26 \sqrt{7} - 18 \sqrt{7} )[/tex]
[tex]25 \sqrt{7} - 29 \sqrt{7} [/tex]
[tex] - 4 \sqrt{7} [/tex]