cmr:1-2/x-(2x+x^2/4+2x+x^2 + 2x-x^2/4-2x+x^2):(16-8x/4-2x+x^2 -16+8x/4+2x+x^2)=(x-1/x)^2

(2x-1/x)^4

(2x^2-1/x)^4

[(2x)^2-1/x]^4

[(2x)^2-1/x^2]^4

(2x-1/x)^4

(2x^2-1/x)^4

[(2x)^2-1/x]^4

[(2x)^2-1/x^2]^4

(2x-1/x)^4

(2x^2-1/x)^4

[(2x)^2-1/x]^4

[(2x)^2-1/x^2]^4

(2x-1/x)^4

(2x^2-1/x)^4

[(2x)^2-1/x]^4

[(2x)^2-1/x^2]^4

Đa thức P(x) = 2x^4 + 3x^2 − x^3 − 3x^4 − x^2 − 2x + 1 sau khi được thu gọn và sắp xếp theo bậc giảm dần của biến là:
A. P(x) = x^4 − x^3 + 2x^2 − 2x + 1
B.P(x) = −x^4 − x^3 + 3x^2 − 2x + 1
C. P(x) = −x^4 − x^3 + 2x^2 − 2x + 1
D. P(x) = x^4 − x^3 − 2x^2 − 2x + 1

Rút gọn :

1.  (2x-5)(3x+1)-(x-3)^2+(2x+5)^2-(3x+1)^3

2.  (2x-1)(2x+1)-3x-2)(2x+3)-(x-1)^3+(2x+3)^3

3. (x-2)(x^2+2x+4)-(3x-2)^3+(3x-4)^2

4. (7x-1)(8x+2)-(2x-7)^2-(x-4)^3-(3x+1)^3

5. (5x-1)(5x+1)-(x+3)(x^2-3x+9)-(2x+4)^2-(3x-4)^2+(2x-5)^3

6. (4x-1)(x+2)-(2x+5)^2-(3x-7)^2+(2x+3)^3=(3x-1)^3

làm phép chia :

a) (x^4 -2x^3 + 2x -1) : (x^2 - 1)

b) (x^3 -8) : (x^2 + 2x +4)

c) (x^6 - 2x^5 + 2x^4 + 6x^3 - 4x^2)n: 6x^2

d) (-2x^5 + 3x^2 - 4x^3) :2x^2

e) (15x^3 - 10x^2 + x - 2) : (x - 2)

f) (2x^4 - 3x^3 - 3x^2 + 6x - 2) : (x^2 - 2)

a,x^2+2x/(x+1)^2+3-x^2-2x/(x-1)^2+3=16/x^4+4x^2+16
b,x^2/x^2+2x+2+x^2/x^2-2x+2=5(x^2-5)/x^4+4+25/4

1. 2x*(3x^2+4)-6x*(x-7)

2. (x+1)*(2x-2)-(2x-1)^2

3. (2x-3)^2-2*(2x-3)*(2x+5)+(2x+5)^2

4. (x-2)^4+(x+2)^4

5. (x+1)^5-(x-1)^5