sederhanakan bilangan berikut 4 3√9 ( 3√3 - 3√81 ) =
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4 × [tex]3 \sqrt{9} \: (3 \sqrt{3} - 3 \sqrt{81} )[/tex]
= 4 × [tex]3 \times 3 \: (3 \sqrt{3} - 3 \times 9)[/tex]
= [tex]36 \: (3 \sqrt{3} - 27)[/tex]
= [tex]36 \times 3 \: ( \sqrt{3} - 9)[/tex]
= [tex]108 \: ( \sqrt{3} - 9)[/tex]
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