\(\left(x^3-x^2\right)^2-4x^2+8x-4=0\\ \Leftrightarrow x^6-2x^5+x^4-4x^2+8x-4=0\\ \Leftrightarrow\left(x-1\right)^2\left(x^2-2\right)\left(x^2+2\right)=0;x^2+2>0\forall x\\ \Rightarrow\left[{}\begin{matrix}x^2-2=0\\x-1=0\end{matrix}\right.\\ \Leftrightarrow\left[{}\begin{matrix}x=1\\x=\sqrt{2}\\x=-\sqrt{2}\end{matrix}\right.\)
\(\dfrac{\text{80x3-125x}}{3\left(x-3\right)-\left(x-3\right)\left(8-4x\right)}\) \(\dfrac{9-\left(x+5^{ }\right)^2}{x^2+4x+4}\)
\(\dfrac{32x-8x^2+2x^3}{x^3+64}\) \(\dfrac{x^2+5x+6}{x^2+4x+4}\)
aRút gọn Biểu thức
b, Tìm x c Z để B c Z
B=x+2/x+3 - 5/x^2 +x-6 + 1/2-x
a,Rút gọn P
b Tìm x để P=0,P=1,P>0
P=x+3/x2+5x+6 : (8x2/4x3-8x2 - 3x/3x2-12 - 1/x+2)
help me please
32x-8x2+2x3/x2+64
5x3+5x/x4-1
x2+5x+6/x2+4x+4
9-(x+5)2/x2+4x+4
các NN giúp mk với.Mk cảm ơn rất nhiều
Rút gọn các phân thức
a)\(\dfrac{x^3+x^2-4x-4}{x^3+8x^2+17x+10}\)
b) \(\dfrac{x^3+3x^2-4}{x^3-3x+2}\)
Rút gon phân thức a)8x^3+y^3/y^3+2xy^2+y^2-4x^2 b)x^2-2x-8/2x^2+9x+10 c)6x-x^2-5/5x^6-x^7. d)x^3+64/2x^3-8x^2+32x. e) x^2+3xy+2y^2/x^3+2x^2y-xy^2-2y^3
Rút gọn:
a) x4 - 4x2 + 3 / x4 + 6x2 - 7
b) x4 + x3 - x - 1 / x4 + x3 + 2x2 + x + 1
c) x3 + 3x2 - 4 / x3 - 3x + 2
d) x3 + x2 - 4x - 4 / x3 + 8x2 + 17x + 10
e) x4 + 6x3 + 9x2 - 1 / x4 + 6x3 + 7x2 - 6x + 1
Rút gọn biểu thức sau:
\(P=1+\dfrac{x+3}{x^2+5x+6}:\left(\dfrac{8x^2}{4x^3-8x^2}+\dfrac{3x}{12-3x^2}-\dfrac{1}{x+2}\right)\)
45x(3-x) =
15x(x-3)3
7x2+14x+7=
3x2+3x
3x2-12x+12=
x4-8x
x3-4x2+4x=
x2-4
y2-x2 . =
x3-3x2y+3xy2-y3
rút gọn:a) \(\dfrac{5x^2+10xy+y^2}{3x^3+3y^3}\)
b)\(\dfrac{x^2+4y^2-4xy-4}{2x^2-4xy+4x}\)
c)\(\dfrac{2x^2+10x+2}{x^3-4x}\)
d)\(\dfrac{8x^3-1}{-4x^2-1-2x}\)
