\(\Leftrightarrow2x^2+2x-3x-3-\dfrac{4x^3-6x^2-6x}{2x}=18\)
\(\Leftrightarrow2x^2-x-3-2x^2+3x+3=18\)
=>2x=18
hay x=9
\(\Leftrightarrow2x^2+2x-3x-3-\dfrac{4x^3-6x^2-6x}{2x}=18\)
\(\Leftrightarrow2x^2-x-3-2x^2+3x+3=18\)
=>2x=18
hay x=9
Tìm x
(2x-3)(x+1)+(4x3-6x2-6x):(-2x)=18
Tìm x
(2x-3)(x+1)+(4x3-6x2-6x):(-2x)=18
Phân tích các đa thức sau thành nhân tử:
1) x3 - 7x + 6
2) x3 - 9x2 + 6x + 16
3) x3 - 6x2 - x + 30
4) 2x3 - x2 + 5x + 3
5) 27x3 - 27x2 + 18x - 4
6) x2 + 2xy + y2 - x - y - 12
7) (x + 2)(x +3)(x + 4)(x + 5) - 24
8) 4x4 - 32x2 + 1
9) 3(x4 + x2 + 1) - (x2 + x + 1)2
10) 64x4 + y4
11) a6 + a4 + a2b2 + b4 - b6
12) x3 + 3xy + y3 - 1
13) 4x4 + 4x3 + 5x2 + 2x + 1
14) x8 + x + 1
15) x8 + 3x4 + 4
16) 3x2 + 22xy + 11x + 37y + 7y2 +10
17) x4 - 8x + 63
Tìm x , biết :
a) (3x -1)(2x+7) -(x+1)(6x-5) =16
b) (2x +3)2-2(2x+3)(2x-5)+(2x-5)2= x2+6x+64
c) (x4+2x3+10x-25): (x2+5)=3
rút gọn biểu thức:
a) (6x + 1)2 (6x - 1)2 - 2 (1 + 6x). (6x - 1)
b) (2x - 3) . (2x + 3) - (x + 5)2 - (x - 1) . (x + 2)
phân tích
1,(x-2)^4+(x-3)^4-1
2,(x-1)^4+(x+3)^4-512
3,(x-2)^6+(x-4)^6-64
4,x^4-3x^3+6x^2+3x+1
5,3x^4-2x^3-15x^2-2x+3
6,x^6-2x^5-4x^4+6x^3+4x^2-2x-1
phân tích đa thức thành nhân tử
a) 4x (a-b) +6xy(b-a)
b) (6x+3) - ( 2x-5) (2x+1)
c) 4 ( x-3)^2 +2x (3-x)
d) x^4 +2x^2 -4x-4
e) 2x (x+y) -x -y
g)( 3x-1 )^2 - (x+3)^2
x^4+2x^3-6x^2+2x+1
1 tim x
2x^4-6x^3+x^2+6x-3=0