467. Выполните умножение: а) 4x · 7y; б) -8x · 5x³; в) -0,6a²b · (-10ab²); г) x²y³ · (-6xy³); д) 1/5 m²n⁴ · 5m³n³.

а) 4x ⋅ 7y = 4 ⋅ 7 ⋅ x ⋅ y = 28xy

б) −8x ⋅ 5x³ = −8 ⋅ 5 ⋅ x ⋅ x³ = -40x⁴

в) −0,6a²b ⋅ (−10ab²) = −0,6 ⋅ (−10) ⋅ a² ⋅ a ⋅ b ⋅ b² = 6a³b³

г) x²y³ ⋅ (−6xy³) = −6 ⋅ x² ⋅ x ⋅ y³ ⋅ y³ = -6x³y⁶

д) 1/5 m²n⁴ ⋅ 5m³n³ = 1/5 ⋅ 5 ⋅ m² ⋅ m³ ⋅ n⁴ ⋅ n³ = m⁵n⁷

Ответ: а) 28xy; б) -40x⁴; в) 6a³b³; г) -6x³y⁶; д) m⁵n⁷