Question

calculo:

a) -9x2Y) . (-5xy2)

b) (+3x2y) .(-xy)​

Answer 1

a) (-9x2Y) . (-5xy2) = 45 x²+¹ y¹+² = 45x³y³

b) (+3x2y) .(-xy) = 3.-1 x²+¹ y¹+¹ = -3x³y²