Các câu hỏi tương tự
A ) \(\frac{11x+1}{86}-\frac{11x-1}{88}+\frac{11x+2}{85}=\frac{11x-2}{89}\)
B ) \(\frac{-3}{x^2-5x+4}+\frac{-3}{x^2-11x+28}+\frac{-3}{x^2-17x+70}=\frac{9}{14}\)
C ) \(x^4+3x^3-7x^2-27x-18=0\)
giai cac phuong trinh sau :
a, 1/x^2+5x+4+1/x^2+11x+28+1/x^2+17x+70=3/6x-2005
b, x+1/x-1+x-2/x+2+x-3/x+3+x+4/x-4=4
c, 1/4x-2006+1/5x+2004=1/15x-2007-1.6x-2005
d, 4x+16/x+6-3/x+1=5/x+3+7/x+5
Giai pt:
1/ \(\frac{1}{x^2+9x+20}+\frac{1}{x^2+11x+20}+\frac{1}{x^2+13x+42}=\frac{1}{18}\)
2/ \(\frac{1}{x^2+5x+4}+\frac{1}{x^2+11x+28}+\frac{1}{x^2+17x+70}+\frac{1}{x^2+23x+130}=\frac{4}{13}\)
3/ \(x^2+\frac{4x^2}{\left(x+2\right)^2}=12\)
4/ \(x^3-x^2-\frac{8}{x^3-x^2}=2\)
Thực hiện phép tính : a) (x-3)(2x - 4) - 2x(x - 5) c) (3x²-17x² + 11x +15): (3x-5) d) b) (2x-5)²-(2x - 3)(2x + 3) 5x² x+2 x 2-x 4x x²-4 e) x-3 x+3 x + 36 x-3 9-x²
Tìm giá trị nhỏ nhất của biểu thức:
\(\frac{1}{x^2+5x+4}\)+\(\frac{1}{x^2+11x+28}\)+\(\frac{1}{x^2+17x+28}\)=\(\frac{3}{4x-2}\)
Thực hiện phép tính:
a.(2x^2 + 2x - 4) : (x + 2)
b. ( 2x^3 - 5x^2 - x +1 ) : (2x + 1 )
c. (x^3 - 2x + 4)/(x + 2)
d. (x^3- 3x^2): (x - 3)
e. (x^4- x- 14): (x- 2)
f. (x^4- x- 14): (x- 2)
g. (17x^2- 6x^4+ 5x^3- 23x+ 7): (7- 3x^2- 2x)
giúp mik đi ạ mik đang cần gấp T-T
giúp mình nhe :>
A)3x^2-x(3x-5)=9
B)5x^2+9x-2=0
C)x/x+5-x-2/x=2x-1/x^2+5x
D)4(5-3x)=5x-5
E)2x^2-11x+14=0
F)3/2x+3-5/x(2x+3)=4/x
Làm phép chia
5x4-3x5+3x-1):(x+1-x2)
(2-4x+3x4+7x2-5x3):(1+x2-x)
17x2+6x4+5x3-23x+7):(7-3x2-2x)
(3x4+11x3-5x2-19x+10):(x2+3x-2)
a)(6x^2+17x+12):(2x+3) b)(5x^2+13x-6):(5x-2) c)(-8x^2+22x-15):(2x-5) d)(14x^2-33x-5):(2x-5) e)(2x^3+7x^2+15x+6):(2x+1) f)(x^3+4x^2-11x-2):(x-2) g)(12x^3+2x^2+4x+3):(2x+1)