Question

Seja:
A = 5xy² B= 2x²y C = 3xy D=x²v E=5x²y F =-4xy²

Calcule os produtos:
a) 3A
b) 7B
c) -2C
d) -4B
e) AB
f) CD
g) - BC
h) -2BD
​

Answer 1

a) 3A = 3.(5xy²) = 3.5.x.y² = 15xy²

b) 7B = 7.(2x²y) = 7.2.x².y = 14x²y

c) -2C = -2.(3xy) = -2.3.x.y = -6xy

d) -4B = -4.(2x²y) = -4.2.x².y = -8x²y

e) AB = (5xy²) . (2x²y) = 5.2.x.x².y².y = 10x³y³

f) CD = (3xy) . (x²v) = 3.x.x².v = 3x³v

g) - BC = (-2x²y) . (3xy) = -2.3.x².x.y.y = -6x³y²

h) -2BD = -2.(2x²y) . (x²v) = -2.2.x².x².y.v = -4x⁴yv

Espero ter ajudado!