Question

Calculați:
a. (-2pe5)•(+15pe4)
b. (-1pe4)•(-4pe9)
c. (+2pe15)•(-25pe24)

Answer 1

a) $-\frac{2}{5}* \frac{15}{4} = -\frac{3}{2} \\ b) -\frac{1}{4}* (-\frac{4}{9})= \frac{1}{9} \\  c) \frac{2}{15}* (-\frac{25}{24}) =- \frac{5}{36}$