[tex]\begin{aligned} \sf \frac{3 {z}^{4} }{ {z}^{2} } \: . \: {5z}^{3} &= \sf(3 \times 5) \frac{ {z}^{4 + 3} }{ {z}^{2} } \\ \sf &= \sf 15 \: \frac{ {z}^{7} }{ {z}^{2} } \\ \sf &= \sf 15 \: {z}^{7 - 2} \\ \sf &= \sf 15 {z}^{5} \end{aligned}[/tex]
Opsi Jawaban: D
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[tex]\begin{aligned} \sf \frac{3 {z}^{4} }{ {z}^{2} } \: . \: {5z}^{3} &= \sf(3 \times 5) \frac{ {z}^{4 + 3} }{ {z}^{2} } \\ \sf &= \sf 15 \: \frac{ {z}^{7} }{ {z}^{2} } \\ \sf &= \sf 15 \: {z}^{7 - 2} \\ \sf &= \sf 15 {z}^{5} \end{aligned}[/tex]
Opsi Jawaban: D