b: \(x^2\left(x-2x^3\right)=x^3-2x^5\)
b: \(\left(x^2+1\right)\left(5-x\right)\)
\(=5x^2-x^3+5-x\)
c: \(\left(x-2\right)\left(x^2+3x-4\right)\)
\(=x^3+3x^2-4x-2x^2-6x+8\)
\(=x^3+x^2-10x+8\)
d: \(\left(x-2y\right)^2=x^2-4xy+4y^2\)
Các bạn giúp mình nha !!! Thanks các bạn !!!
a) 6xz-7x²/4y²+9xz+7x²/4y²
b) 5x+10/4x-8:2x+4/4-2x
c) (2/2x-1 - 2/1-2x):4x²/4x²-1
d) 5b/b²-9.b-3/10b
e) (5/3(x+2)² - 2x/3x+6 + 1/3).x+2/x-3
f) (x/x-y - y/x+y + 2xy/x²-y²):x+y/2x-2y.
1. a,\(\dfrac{2}{3}xy\left(3x^2y-3yx+y^2\right)\) b.(2x+1) (6x3 - 7x2 - x + 2)
c. (25x5-5x4+10x2): 5x2 d.(x2 - 2x + 1) : (1 - x)
giúp mk vs mai thi rồi
b) (4 trên x^3-4x +1 trên x+2) :(x-2 trên x^2+2x-x trên 2x+4)
c) (x-3 trên x) :(x^2+2x+1 trên x -2x+4 trên x)
giúp vs đc k gấp nắm
2/x-3 = 1/x+2
5/3x-2 - 1/x-4 =0
3/x+4 = 2/2x+1
7/3x-4 - 3/3x-3 =0
Hãy làm các phép chia sau :
a) \(\dfrac{7x+2}{3xy^3}:\dfrac{14x+4}{x^2y}\)
b) \(\dfrac{8xy}{3x-1}:\dfrac{12xy^3}{5-15x}\)
c) \(\dfrac{27-x^3}{5x+5}:\dfrac{2x-6}{3x+3}\)
d) \(\left(4x^2-16\right):\dfrac{3x+6}{7x-2}\)
e) \(\dfrac{3x^3+3}{x-1}:\left(x^2-x+1\right)\)
Thực hiện phép tính:
a) \(\dfrac{2x ^2-20x+50}{3x+3}.\dfrac{x^2-1}{4\left(x-5\right)^3}\)
b)\(\dfrac{x^{ }^2+x}{5x^2-10x+5}:\dfrac{3x+3}{5x-5}\)
Tìm phân thức P biết :
a) \(p=\dfrac{4x^2-16}{2x+1}=\dfrac{4x^2+4x+1}{x-2}\)
b) \(\dfrac{2x^2+4x+8}{x^3-3x^2-x+3}:P=\dfrac{x^3-8}{\left(x+1\right)\left(x-3\right)}\)
Làm tính chia
a)(x^3-1):(x-1)
b)(x^3+x^2-x+1):(x+2)
c)(x^5-4x^3-5x^2+10x):(x^2-2x)
Rút gọn biểu thức :
a) \(\dfrac{x^4-xy^3}{2xy+y^2}:\dfrac{x^3+x^2y+xy^2}{2x+y}\)
b) \(\dfrac{5x^2-10xy+5y^2}{2x^2-2xy+2y^2}:\dfrac{8x-8y}{10x^3+10^3}\)
