Question

Calcule:
a) (2xb) . (4x) =
b) (-5) . (+15x²y) =
c) (-9x²y) . (-5xy²) =
d) (-3x) (+2xy) . (-x³) =
e) (-x³) . (5yx²) . (2y²)=

Answer 1

a) (2xb) . (4x) = 8x²b
b) (-5) . (+15x²y) = -75x²y
c) (-9x²y) . (-5xy²) = +45x³y³
d) (-3x) . (+2xy) . (-x³) = +6x^5y
e) (-x³) . (5yx²) . (2y²) = -10y³x^5