\(\Leftrightarrow x^4+\left(x-1\right)^3+\left(x-1\right)=0\)
\(\Leftrightarrow x^4+x^3-3x^2+3x-1+x-1=0\)
\(\Leftrightarrow x^4+x^3-3x^2+4x-2=0\)
=>(x^2-x+1)(x^2+2x-2)=0
=>x^2+2x-2=0
hay \(x\in\left\{-1+\sqrt{3};-1-\sqrt{3}\right\}\)
\(\Leftrightarrow x^4+\left(x-1\right)^3+\left(x-1\right)=0\)
\(\Leftrightarrow x^4+x^3-3x^2+3x-1+x-1=0\)
\(\Leftrightarrow x^4+x^3-3x^2+4x-2=0\)
=>(x^2-x+1)(x^2+2x-2)=0
=>x^2+2x-2=0
hay \(x\in\left\{-1+\sqrt{3};-1-\sqrt{3}\right\}\)
giải pt vô tỉ sau
\(3x\left(2+\sqrt{9x^2+3}\right)+\left(4x+2\right)\left(1+\sqrt{1+x+x^2}\right)=0\)
Giúp e với ạ !!
Giải pt vô tỉ sau
\(x+1=\sqrt{2\left(x+1\right)+2\sqrt{2\left(x+1\right)+2\sqrt{4\left(x+1\right)}}}\)
Bài 1: giải các PT sau
a) \(2\sqrt{x}=6\)
b) \(4-5\sqrt{x}=-1\)
c) \(4\sqrt{x}=-3\)
d) \(\sqrt{x}\left(\sqrt{x}-2\right)=0\)
e) \(\left(\sqrt{x}+1\right)\left(\sqrt{x}-3\right)=0\)
f) \(\left(\sqrt{x}+\sqrt{2}\right)\left(\sqrt{x}+3\right)=0\)
Bài 2:
\(9\left(x+2\right)^2-108=0\)
Giúp mình giải bài này với ạ Đề :giải pt sau :\(\dfrac{\left(x+3\right)\left(x-3\right)}{3}+2=x.\left(1-x\right)\)
giải pt: \(\sqrt{\left(2x^2+x+9\right)}+\sqrt{\left(2x^2-x+1\right)}=x+4\)
Giải hệ PT:
\(\left\{{}\begin{matrix}\left(x^2+x\right)y^2-4y^2+y+1=0\\xy+x^2y^2+x^3y^3-y^3+1=0\end{matrix}\right.\)
Giải PT: \(x=\left(2011+\sqrt{x}\right)\left(1-\sqrt{1-\sqrt{x}}\right)^2\)
giải pt theo cách giải \(\Delta\)
a,\(\dfrac{60}{x}-\dfrac{1}{2}=\dfrac{60}{x+2}\)
b,\(\dfrac{x+2}{x-1}=\dfrac{4x^2-11x+2}{\left(x+2\right)\left(1-x\right)}\)
c,\(\left(3x^2+2\right)^2-15x^3-10x=0\)
Giải phương trình
\(\frac{3\left(x-\sqrt{3}\right)\left(x-\sqrt{5}\right)}{\left(1-\sqrt{3}\right)\left(1-\sqrt{5}\right)}+\frac{4\left(x-1\right)\left(x-\sqrt{5}\right)}{\left(\sqrt{3}-1\right)\left(\sqrt{3}-\sqrt{5}\right)}+\frac{5\left(x-1\right)\left(x+\sqrt{3}\right)}{\left(\sqrt{5}-1\right)\left(\sqrt{5}-\sqrt{3}\right)}=3x-2\)