Tolong bantu jawab ya hehehe. Sama caranya ya hehehe

[tex] \frac{x ^{2} + 1}{5} \times \frac{2x}{3} \\ = \frac{2x(x ^{2} + 1) }{5 \times 3} \\ = \frac{2x ^{3} + 2x}{15} [/tex]

Maaf Kalau Salah