Question

Calcule as MULTIPLICAÇÕES dos monomios:

a) (3x) . (4x²) =

b) (-xy) . ( -2x)=

c) (5xy) . ( - 2xy²) =

d) ( x ) . ( 3xy ) . ( 3y²) =

e) 5a ( 3a - ab) =

f) 2x ( x + 3x + 4xy) =

g) (2x + 3xy) . ( x + 3x) =

h) ( 3ab + b ) . ( 2a + 2b) =

Me ajudemmm, rápidoo

Answer 1

Resposta:

a) (3x) . (4x²) =

$= 12 {x}^{3}$

b) (-xy) . ( -2x)=

$= 2 {x}^{2} y$

c) (5xy) . ( - 2xy²) =

$- 10 {x}^{2} {y}^{3}$

d) ( x ) . ( 3xy ) . ( 3y²) =

$3 {x}^{2} y \times (3 {y}^{2}) \\ = 9 {x}^{2} {y}^{3}$

e) 5a ( 3a - ab) =

$15 {a}^{2} - 5 {a}^{2} b$

f) 2x ( x + 3x + 4xy) =

$2 {x}^{2} + 6 {x}^{2} + 8 {x}^{2} y \\ 8 {x}^{2} + 8 {x}^{2} y$

g) (2x + 3xy) . ( x + 3x) =

$2 {x}^{2} + 6 {x}^{2} + 3 {x}^{2} y + 9 {x}^{2} y \\ 8 {x}^{2} + 12 {x}^{2} y$

h) ( 3ab + b ) . ( 2a + 2b) =

$6 {a}^{2} b + 6a {b}^{2} + 2ab + 2 {b}^{2}$