Respostas
LEMBRETES > NA DIVISÃO DIMINUI-SE OS EXPOENTES
REGRA DOS SINAIS
+ COM + = +
+ COM - = -
- COM -+
a
(12a² + 9a) : ( + 3a¹)
12a² : 3a¹ = 4a¹ >>>> ( 2 - 1 = 1)
+9a¹ : 3a¹ = 3a¹⁻¹ = 3a⁰ = 3.1 = 3 ( corta a )
expoente zero = 1 ***
resposta 4a + 3 ****
b
( 15x³ - 10x² ) : ( - 5x¹ ) =- 3x² + 2x ***
fazendo como a anterior
15x³ : ( -5x¹ ) = - 3x²
-10x² : ( -5x¹) = + 2x
resposta > -3x² + 2x ***
c
( ax + bx ) : x =
ax : x = a corta x
bhx : x = b corta x
resposta a + b ***
d
( 3a² + 6a¹ ) : ( 4a¹ )
3a² : ( 4a¹) =( 3/4) a
6a¹ : 4a¹ = 6/4 ou (3/2 ) corta a pois 1 -1 = 0
resposta ( 3/4)a + 3/2 ***
e
( 2x² - 5x¹ ) : ( - 3x )
2x² : ( -3x¹) = ( - 2/3)x ****
( -5x¹ ) : ( - 3x ) =( + 5/3 ) corta x pois 1 - 1= 0
resposta > ( -2/3)x + 5/3 ****
f
(6/1 )a³ - (3/4)a² + ( 1/2)a] : [( +4/3)a]
(6/1)a³ : ( +4/3)a =
( 6/1) : 4/3 = 6/1 * 3/4 = ( 18/4) = (9/2)a²***
( - 3/4)a² : ( +4/3)a =
( -3/4)a² : ( +4/3)a = ( -3/4 ) * ( 3/4) =( -9/16 )a ****
( + 1/2)a : ( + 4/3)a =
( +1/2) : ( + 4/3) = ( +1/2) * ( +3/4) = ( + 3/8) *** corta a
resposta>> ( 9/2)a² - ( 9/16)a + 3/8 *** ou
9a²/2 - 9a/16 + 3/8 ****