2 – SUBTRAÇÃO DE POLINÔMIOS
a) (5x²-4x+7)-(3x²+7x-1)
b) (6x²-6x+9)-(3x²+8x-2)
c) (7x-4y+2)-(2x-2y+5)
d) (4x-y-1)-(9x+y+3)
e) (-2a²-3ª+6)-(-4a²-5ª+6)
f) (4x³-6x²+3x)-(7x³-6x²+8x)
g) (x²-5x+3)-(4x²+6)
h) (x²+2xy+y²)-(y²+x²+2xy)
i) (7ab+4c-3a)-(5c+4a-10)
Soluções para a tarefa
Respondido por
125
a) (5x²-4x+7)-(3x²+7x-1)=
5x²-4x+7-3x²-7x+1=
5x²-3x²-4x-7x+7+1=
2x²-11x+8
b) (6x²-6x+9)-(3x²+8x-2)=
6x²-6x+9-3x²-8x+2=
6x²-3x²-6x-8x+9+2=
3x²-14x+11
c) (7x-4y+2)-(2x-2y+5)=
7x-4y+2-2x+2y-5=
7x-2x-4y+2y+2-5=
5x-2y-3
d) (4x-y-1)-(9x+y+3)=
4x-y-1-9x-y-3=
4x-9x-y-y-1-3=
-5x-2y-4
e) (-2a²-3ª+6)-(-4a²-5ª+6)=
-2a²-3a+6+4a²+5a-6=
-2a²+4a²-3a+5a+6-6=
2a²+2a
f) (4x³-6x²+3x)-(7x³-6x²+8x)=
4x³-6x²+3x-7x³+6x²-8x=
4x³-7x³-6x²+6x²+3x-8x=
-3x³-5x
g) (x²-5x+3)-(4x²+6)=
x²-5x+3-4x²-6=
x²-4x²-5x+3-6=
-3x²-5x-3
h) (x²+2xy+y²)-(y²+x²+2xy)=
x²+2xy+y²-y²-x²-2xy=
x²-x²+2xy-2xy+y²-y²=
0
i) (7ab+4c-3a)-(5c+4a-10)=
7ab+4c-3a-5c-4a+10=
7ab+4c-5c-3a-4a+10=
7ab-c-7a+10
5x²-4x+7-3x²-7x+1=
5x²-3x²-4x-7x+7+1=
2x²-11x+8
b) (6x²-6x+9)-(3x²+8x-2)=
6x²-6x+9-3x²-8x+2=
6x²-3x²-6x-8x+9+2=
3x²-14x+11
c) (7x-4y+2)-(2x-2y+5)=
7x-4y+2-2x+2y-5=
7x-2x-4y+2y+2-5=
5x-2y-3
d) (4x-y-1)-(9x+y+3)=
4x-y-1-9x-y-3=
4x-9x-y-y-1-3=
-5x-2y-4
e) (-2a²-3ª+6)-(-4a²-5ª+6)=
-2a²-3a+6+4a²+5a-6=
-2a²+4a²-3a+5a+6-6=
2a²+2a
f) (4x³-6x²+3x)-(7x³-6x²+8x)=
4x³-6x²+3x-7x³+6x²-8x=
4x³-7x³-6x²+6x²+3x-8x=
-3x³-5x
g) (x²-5x+3)-(4x²+6)=
x²-5x+3-4x²-6=
x²-4x²-5x+3-6=
-3x²-5x-3
h) (x²+2xy+y²)-(y²+x²+2xy)=
x²+2xy+y²-y²-x²-2xy=
x²-x²+2xy-2xy+y²-y²=
0
i) (7ab+4c-3a)-(5c+4a-10)=
7ab+4c-3a-5c-4a+10=
7ab+4c-5c-3a-4a+10=
7ab-c-7a+10
thalia21102001:
pode me ajudar com, outras
Respondido por
45
a)
= (5x² - 4x + 7) - (3x² + 7x - 1)
= 5x² - 4x + 7 - 3x² - 7x + 1
= 5x² - 3x² - 4x - 7x + 7 + 1
= 2x² - 11x + 8
----------------------------------------------
b)
= (6x² - 6x + 9) - (3x² + 8x - 2)
= 6x² - 6x + 9 - 3x² - 8x + 2
= 6x² - 3x² - 6x - 8x + 9 + 2
= 3x² - 14x + 11
------------------------------------------------------
c)
= (7x - 4y + 2) - (2x - 2y + 5)
= 7x - 4y + 2 - 2x + 2y - 5
= 7x - 2x - 4y + 2y + 2 - 5
= 5x - 2y - 3
--------------------------------------------------
d)
= (4x - y - 1) - (9x + y + 3)
= 4x - y - 1 - 9x - y - 3
= 4x - 9x - y - y - 1 - 3
= - 5x - 2y - 4
---------------------------------------------
e)
= (- 2a² - 3a + 6) - ( - 4a² - 5a + 6)
= - 2a² - 3a + 6 + 4a² + 5a - 6
= - 2a² + 4a² - 3a + 5a + 6 - 6
= 2a² + 2a + 0
= 2a² + 2a
ou
= 2a.(a + 1)
----------------------------------------------------------
f)
= (4x³ - 6x² + 3x) - (7x³ - 6x² + 8x)
= 4x³ - 6x² + 3x - 7x³ + 6x² - 8x
= 4x³ - 7x³ - 6x² + 6x² + 3x - 8x
= - 3x³ + 0 - 5x
= - 3x³ - 5x
-----------------------------------------------------
g)
= (x² - 5x + 3) - (4x² + 6)
= x² - 5x + 3 - 4x² - 6
= x² - 4x² - 5x + 3 - 6
= - 3x² - 5x - 3
--------------------------------------
h)
= (x² + 2xy + y²) - (y² + x² + 2xy)
= x² + 2xy + y² - y² - x² - 2xy
= x² - x² + 2xy - 2xy + y² - y²
= 0
**************************************
i)
= (7ab + 4c - 3a) - (5c + 4a - 10)
= 7ab + 4c - 3a - 5c - 4a + 10
= 7ab + 4c - 5c - 3a - 4a + 10
= 7ab - c - 7a + 10
= (5x² - 4x + 7) - (3x² + 7x - 1)
= 5x² - 4x + 7 - 3x² - 7x + 1
= 5x² - 3x² - 4x - 7x + 7 + 1
= 2x² - 11x + 8
----------------------------------------------
b)
= (6x² - 6x + 9) - (3x² + 8x - 2)
= 6x² - 6x + 9 - 3x² - 8x + 2
= 6x² - 3x² - 6x - 8x + 9 + 2
= 3x² - 14x + 11
------------------------------------------------------
c)
= (7x - 4y + 2) - (2x - 2y + 5)
= 7x - 4y + 2 - 2x + 2y - 5
= 7x - 2x - 4y + 2y + 2 - 5
= 5x - 2y - 3
--------------------------------------------------
d)
= (4x - y - 1) - (9x + y + 3)
= 4x - y - 1 - 9x - y - 3
= 4x - 9x - y - y - 1 - 3
= - 5x - 2y - 4
---------------------------------------------
e)
= (- 2a² - 3a + 6) - ( - 4a² - 5a + 6)
= - 2a² - 3a + 6 + 4a² + 5a - 6
= - 2a² + 4a² - 3a + 5a + 6 - 6
= 2a² + 2a + 0
= 2a² + 2a
ou
= 2a.(a + 1)
----------------------------------------------------------
f)
= (4x³ - 6x² + 3x) - (7x³ - 6x² + 8x)
= 4x³ - 6x² + 3x - 7x³ + 6x² - 8x
= 4x³ - 7x³ - 6x² + 6x² + 3x - 8x
= - 3x³ + 0 - 5x
= - 3x³ - 5x
-----------------------------------------------------
g)
= (x² - 5x + 3) - (4x² + 6)
= x² - 5x + 3 - 4x² - 6
= x² - 4x² - 5x + 3 - 6
= - 3x² - 5x - 3
--------------------------------------
h)
= (x² + 2xy + y²) - (y² + x² + 2xy)
= x² + 2xy + y² - y² - x² - 2xy
= x² - x² + 2xy - 2xy + y² - y²
= 0
**************************************
i)
= (7ab + 4c - 3a) - (5c + 4a - 10)
= 7ab + 4c - 3a - 5c - 4a + 10
= 7ab + 4c - 5c - 3a - 4a + 10
= 7ab - c - 7a + 10
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