Two marks exercise problems VII — task. Mathematics State Board, Class 9.

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Simplify the following using addition and subtraction properties of surds:

(i)

$5 \sqrt{3} + 18 \sqrt{3} - 2 \sqrt{3}$

$=$

$i \sqrt{i}$

(ii)

$4 \sqrt[3]{5} + 2 \sqrt[3]{5} - 3 \sqrt[3]{5}$

$=$

$i \sqrt[i]{i}$

(iii)

$3 \sqrt{75} + 5 \sqrt{48} - \sqrt{243}$

$=$

$i \sqrt{i}$

(iv)

$5 \sqrt[3]{40} + 2 \sqrt[3]{625} - 3 \sqrt[3]{320}$

$=$

$i \sqrt[i]{i}$

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