Question

2.Efetue as multiplicações:
a)3x(x²-2x+3)=
b)4xy(3x²-y)=
c)-3a³(a⁴-2a+1)=
d)5a³(a⁴-2a+1)=
​

Answer 1

Resposta:

a)3x(x²-2x+3)=

$= 3 {x}^{3} - 6 {x}^{2} + 9x$

b)4xy(3x²-y)=

$4 {x}^{3} y - 4x {y}^{2}$

c)-3a³(a⁴-2a+1)=

$- 3 {a}^{7} + 6 {a}^{4} - 3 {a}^{3}$

d)5a³(a⁴-2a+1)=

$5 {a}^{7} - 10 {a}^{4} + 5 {a}^{3}$