\(\left(x-\dfrac{1}{3}\right)^3=x^3-x^2+\dfrac{1}{3}x-\dfrac{1}{27}\)
\(\left(x-\dfrac{1}{3}\right)^3=x^3-x^2+\dfrac{1}{3}x-\dfrac{1}{27}\)
1. (x-6)^2 = 2(x-6)
2. 2(x-3)^2 = (x-3)(x+5)
3. 4(x-3)=2x-5(2x+3)
4. x2 +4 -2 (x-1) = (x-2)^2
5. x-3/5 = 6 - 1-2x/3
6. x+2 = 6-5x/2
7. x+2/5 - x+3 = x-2/2
8. 2x-5/x-4 = 2x+1/x+2
9. X+3/x-3 - x-1/x+3 = x2 + 4x + 6/x2 -9
10. 3x-3/x2-9 -1/x-3 = x+1/x+3
11. X+1/x-1 - x-1/x+1 = 4/x2 -1
\(\dfrac{1}{27}+a^3\\ 8x^3+27y^3\\ \dfrac{1}{8}x^3+8y^3\\ x^6+1\\ x^9+1\\ x^3-64\\ x^3-125\\ 8x^6-27y^3\\ \dfrac{1}{64}x^6-125y^3\\ \dfrac{1}{8}x^3-8\\ x^3+6x^2+12x+8\\ x^3+9x^2+27x+27\) Giúp mình với mình cần gấp ;-;
giải phương trình (x^2+3x+3)^3 + ( x^2 -x-1)^3 +(-2x^2-2x-1)^3=1
coi (x^2+3x+3)^3 = a
coi ( x^2 -x-1)^3 = b
coi (-2x^2-2x-1)^3 = c
Bài 1. Tìm x, biết
a) (x+4)2-x2(x+12)=16
c) (x+3)3-x(3x+1)2+(2x+1)(4x2-2x+1)=28
d) (x-2)3-(x+5)(x2-5x+25)-6x2=11
Bài 2. Rút gọn các biểu thức sau:
A = (x+1)3+(x-1)3
B = (x-3)3-(x+3)(x2-3x+9)+(3x-1)(3x+1)
Tìm x
a)(2x-1)^3-(2x-1)^3=-8
b)x(x-2)(x+2)-3(2x-1)^2-2x-5=-6x(x+1) c)(x+1)^3-(x-1)^3-6(x-1)^2=-10tìm x biết
a) (x-2)3-x(x+1)(x-1)+6x(x-3)=10
b) (x+1)3-(x-1)3-6(x-1)2= -10
c) x3+3x2+3x+28=0
d) x3-6x2+12x-7=0
bt1: tìm x, biết
a) (2x + 3)2 + (x - 1)(x + 1) = 5(x + 2)2 - (x - 5)(x + 1) + (x + 4)2
b) (x + 1)3 - (x + 3)(x2 - 3x + 9) = (x - 3)2 + 3(2x + 1)2 - (x3 - 5x + 1)
Thực hiện phép tính:
a)(x-2)^3
b)(x+3)^3
c)(2x+3)^2
d)( 1 phần 2 x 3y)^3 +x-1
e)(x-1)^3 - x (x-2)^2 + x-1
f)(x+2)^3 -x^2 (x+6)-8