\(\Leftrightarrow x^2-8x+16-x^2+4=6\)
\(\Leftrightarrow-8x=6-16-4\)
\(\Leftrightarrow-8x=-14\)
\(\Leftrightarrow x=-14:\left(-8\right)\)
\(\Leftrightarrow x=1,75\)
Phân tích thành nhân tử
1) (x-1) (x+2) (x+3) (x-6) + 32x^2
2) (x+1) (x-4) ( x+2) ( x-8) +4x^2
3) ( x - 2) ( x-3) ( x-6) (x-4) - 75x^2
4) (x+3)(x-1)(x-5)(x+15)+64x^2
5) (x+2)(x-4)(x+6)(x-12)+36x^2
6) (x-2)(x-4)(x-5)(x-10)-54x^2
1) (3x-2)/3-2=(4x+1)/42) (x-3)/4+(2x-1)/3=(2-x)/63) 1/2 (x+1)+1/4 (x+3)=3-1/3 (x+2)4) (x+4)/5-x+4=x/3-(x-2)/25) (4-5x)/6=2(-x+1)/2 6) (-(x-3))/2-2=5(x+2)/4 7)2(2x+1)/5-(6+x)/3=(5-4x)/158) (7-3x)/2-(5+x)/5=1 9)(x-1)/2+3(x+1)/8=(11-5x)/310)(3+5x)/5-3=(9x-3)/4
1) 2x+6=0
2)(x^2-2x+1)-4=0
3)x-2/x+2+3/x-2=x^2-11/x^2-4
4)x(x^2-1)=0
5)4x+20=0
6)x+3/x+1+x-2/x=2
7)1+2x-5/6=3-x/4
8x+2/x-2-1/x=2/x^2-2x
9)2(x+1)=5x-7
A= [3/2-(x^4-x^4+1/x^2+1)*x^2-x(4*x-1)-4/x^7+6*x^4-x-6]/x^3+29*x+78/3*x^2+12*x-36.rut gon
Biểu thức nào sau đây không phụ thuộc vào biến x
A. (x – 3)2 – x(x + 6) C. (x + 2)2 – x(x – 4)
B. (x – 2)2 + x(x – 4) D. (x – 3)2 – x(x – 6)
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
Giải phương trình
1) (3x-2)/3-2=(4x+1)/4
2) (x-3)/4+(2x-1)/3=(2-x)/6
3) 1/2 (x+1)+1/4 (x+3)=3-1/3 (x+2)
4) (x+4)/5-x+4=x/3-(x-2)/2
5) (4-5x)/6=2(-x+1)/2
6) (-(x-3))/2-2=5(x+2)/4
7)2(2x+1)/5-(6+x)/3=(5-4x)/15
8) (7-3x)/2-(5+x)/5=1
9)(x-1)/2+3(x+1)/8=(11-5x)/3
10)(3+5x)/5-3=(9x-3)/4
Giải phương trình:
a) (x-2)2-(x-3)(x+3)=6
b) (x+3)2 + (4+x)(4-x)=10
c) (x+4)2 + (1-x)(1+x)=7
d) (x-4)2 -(x-2)(x+2)=6
Phân tích đa thức thành nhân tử.
1)x^4+2x^3-4x-4
2)(x+2)(x+4)(x+6)(x+8)+16
3)(x^2+x).(x^2+x+1)-6
4)(x^2+4x+8)^2+3x(x^2+4x+8)
GPT:
1)(x+1006/1000)+(x+1007/999)+(x+1008/998)+(x+1009/997)+(x+2022/4)=0
2)(x-999/99)+(x-896/101)+(x-769/103)=6
3)x4+x3+6x2=-5(x+1)
4)(x+1)(x+2)(X+3)(x+4)=24
5)(x+1)(x+2)(x+4)(x+5)=40
6)(x+1/x2+x+1)-(x-1/x2-x+1)=2(x+2)2/x6-1
7)2x4-7x3-2x2+13x+6/(x+1)(2x+1)=0
8)2x4-7x3-2x2+13x+6=0
