Jawaban:
B. -5√5
Penjelasan dengan langkah-langkah:
[tex]3 \sqrt{5} - \frac{10}{ \sqrt{5} } - 2 \sqrt{45} [/tex]
[tex] = 3 \sqrt{5} - \frac{10}{ \sqrt{5} } \times \frac{ \sqrt{5} }{ \sqrt{5} } - 2 \sqrt{9} \sqrt{5} [/tex]
[tex] = 3 \sqrt{5} - \frac{10 \sqrt{5} }{5} - 2.3 \sqrt{5} [/tex]
[tex] = 3 \sqrt{5} - 2 \sqrt{5} - 6 \sqrt{5} [/tex]
[tex] = (3 - 2 - 6) \sqrt{5} [/tex]
[tex] = - 5 \sqrt{5} \: \: \: (b)[/tex]
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Jawaban:
B. -5√5
Penjelasan dengan langkah-langkah:
[tex]3 \sqrt{5} - \frac{10}{ \sqrt{5} } - 2 \sqrt{45} [/tex]
[tex] = 3 \sqrt{5} - \frac{10}{ \sqrt{5} } \times \frac{ \sqrt{5} }{ \sqrt{5} } - 2 \sqrt{9} \sqrt{5} [/tex]
[tex] = 3 \sqrt{5} - \frac{10 \sqrt{5} }{5} - 2.3 \sqrt{5} [/tex]
[tex] = 3 \sqrt{5} - 2 \sqrt{5} - 6 \sqrt{5} [/tex]
[tex] = (3 - 2 - 6) \sqrt{5} [/tex]
[tex] = - 5 \sqrt{5} \: \: \: (b)[/tex]