2x+3x:4x+8x+9x
Thực hiện phép chia:
a) \((3x^5-9x^6+12x^9):3x\)
b) \((6x^4+4x^3+8x^2):(2x)\)
c) \((8x^6+16x^5-10x^4):(2x^4)\)
d) \((4x^4+6x^5+14x^7):(2x^3)\)
a: =x^4-3x^5+4x^8
b: =2x^3+2x^2+4x
c: =4x^2+8x-5
d: =2x+3x^2+7x^4
x+2x+3x+3x+4x+5x+6x+7x+8x+9x+10x=-165.tim x
X*(1+2+3+4+5+6+7+8+9+10)=-165
X*55=-165
X=-165/55=-3
111111111111111111111111111111111111111111111111111111111111111111111111111111111111111
(1x + 9x) + (2x + 8x) + (3x + 7x) + (4x + 6x) + 5x + 10x = -165
10x^6 + 5x = -165
= 65x (-165)
= -100
Tìm x biết :
a, ( 3x + 2016 ) - ( 2x - 15 ) = 2016
b, - 2(x + 41 ) - (8x - 82 ) = 3 - 9x
c, ( 4x - 1) - (52 + 3x) = 2x - 41
d, - ( 3x + 217 ) - ( 4x - 217) + 5 = 3 - 8x
a) x= - 15
b) x= - 2
c) x= -12
d) x= -2
x + 2x + 3x + 4x + 5x + 6x + 7x + 8x + 9x = 90
x * [ 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 + 1 ] = 90
x * 45 = 90
x = 2
MN giups mik nha
a) 7-2x=22-9x
b) x-12+4x=25+2x-1
c) 11+8x-3-5x-3x+x
d) 3-4y+24+6y-y+27-3y
e)8x-3-9x+12
f) x+2x+3x-19-9x+3x
g) 4-2x+15-9x+4-2x
\(\text{a) 7-2x=22-9x}\)
\(\Leftrightarrow\text{7-2x-22+9x=0}\)
\(\Leftrightarrow-15+7x=0\)
\(\Leftrightarrow7x=15\)
\(\Leftrightarrow x=\frac{15}{7}\)
Học tốt
#Thảo Vy#
\(\text{b) x-12+4x=25+2x-1}\)
\(\Leftrightarrow x-12+4x-25-2x+1=0\)
\(\Leftrightarrow3x-36=0\)
\(\Leftrightarrow x=\frac{36}{3}=12\)
Vậy..
Học tốt
#Thảo Vy#
Thu gọn đa thức sau:
-9x^5+6+8x-3x^4+4x^3+3x^5-4-2x
Giải
Ta có : -9.x5 + 6 + 8.x - 3.x 4 + 4.x3 + 3.x5 - 4 - 2.x
= -6.x5 - 3.x4 + 4.x3 + 6.x + 2
x.1x.2x.3x.4x.5x.6x.7x.8x.9x.10x.11x=5500
x=?
Phân tích đa thức thành nhân tử
a) x³-3x²+3x-1-8y³
b) x^6-x⁴-9x³+9x²
c) x⁴-4x³+8x²-16x+16
d) x²-3x-4
e) 10x²-29x+10
f) x²+8x+12
g) 2x²-9x+9
h) 4x²+12x-7
i) x²-15x+56
tìm x biết
a) (6x-3) (2x+4) + (4x-1) (5-3x) = -21
b) 6x (3x+5) - 2x (9x-2) + (17-x) (x-1) + x (x-18) =0
c) (15-2x) (4x+1) - (13-4x) (2x-3) - (x-1) (x+2) + x2=52
d) (8x-3) (3x+2) - (4x+7) (x+4) = (2x+1) (5x-1) - 33
Rút gọn hết ta được :
a/ 41x - 17 = -21
=> 41x = -4 => x = 4/41
b/ 34x - 17 = 0
=> 34x = 17
=> x = 17/34 = 1/2
c/ 19x + 56 = 52
=> 19x = -4
=> x = -4/19
d/ 20x2 - 16x - 34 = 10x2 + 3x - 34
=> 10x2 - 19x = 0
=> x(10x - 19) = 0
=> x = 0
hoặc 10x - 19 = 0 => 10x = 19 => x = 19/10
Vậy x = 0 ; x = 19/10
Rút gọn hết ta được :
a/ 41x - 17 = -21
=> 41x = -4 => x = 4/41
b/ 34x - 17 = 0
=> 34x = 17
=> x = 17/34 = 1/2
c/ 19x + 56 = 52
=> 19x = -4
=> x = -4/19
d/ 20x 2 - 16x - 34 = 10x 2 + 3x - 34
=> 10x 2 - 19x = 0
=> x(10x - 19) = 0
=> x = 0 hoặc 10x - 19 = 0
=> 10x = 19
=> x = 19/10
Vậy x = 0 ; x = 19/10
a) ( 6x - 3 ) ( 2x + 4 ) + ( 4x - 1 ) ( 5 - 3x ) = -21
<=> 12x2 + 24x - 6x - 12 + 20x - 12x2 - 5 + 3x = -21
<=> 41x = -21 + 12 + 5
<=> 41x = -4
<=> x = -4/41