=>(x^2+3)*căn x^2-x+1=x^3+3x^2-4x+1
=>(x^2+3)(x^2-x-120/49)/[căn (x^2-x+1)+13/7=(x+2)(x-2)(x+8/7)
=>x=-8/7 hoặc \(\dfrac{\left(x^2+3\right)\left(x-\dfrac{15}{7}\right)}{\sqrt{x^2-x+1}+\dfrac{13}{7}}=x^2-4\)
=>x=-8/7 hoặc \(x=\dfrac{1\pm\sqrt{3+2\sqrt{5}}}{2}\)
1, gpt:
\(3\sqrt{1+x}+3\sqrt{3-3x}=\sqrt{28x^2-12x+9}\)
2, giải hpt:
\(\left\{{}\begin{matrix}\dfrac{4}{2x+y}+\dfrac{1}{3x-y}=2\\4x+12y=7\left(2x+y\right)\left(3x-y\right)\end{matrix}\right.\).
Gpt : \(3x^2-4x-7=2\left(x+3\right)\sqrt{2x-1}\)
Giải phương trình:
1, \(\dfrac{x^3+5x^2+4x+2}{x^2+2x+3}=\sqrt{x^2+x+2}\)
2, \(\sqrt{x^3+15}+2=\sqrt{x^3+8}+3x\)
3, \(\sqrt{3x+1}-\sqrt{x+3}+1-x=0\)
Giải phương trình bằng phương pháp bất đẳng thức
1, \(\sqrt{x^2-6x+11}+\sqrt{x^2-6x+13}+\sqrt[4]{x^2-4x+5}=3+\sqrt{2}\)
2, \(\sqrt{x-10}+\sqrt{30-x}=x^2-40x+400+2\sqrt{10}\)
3, \(x^2-3x+3,5=\sqrt{\left(x^2-2x+2\right)\left(x^2-4x+5\right)}\)
4, \(\sqrt{5x^3+3x^2+3x-2}=\dfrac{x^2}{2}+3x-\dfrac{1}{2}\)
5, \(2\sqrt{7x^3-11x^2+25x-12}=x^2+6x-1\)
gpt
\(3x-1+\dfrac{x-1}{4x}=\sqrt{3x+1}\)
Giải phương trình:
1, \(x^2+2x\sqrt{x-\dfrac{1}{x}}=3x+1\)
2, \(\left(13-4x\right)\sqrt{2x-3}+\left(4x-3\right)\sqrt{5-2x}=2+8\sqrt{16x-4x^2-15}\)
3, \(7\sqrt{3x-7}+\left(4x-7\right)\sqrt{7-x}=32\)
giải phương trình
\(3\sqrt{x}+\dfrac{3}{2\sqrt{x}}< 2x+\dfrac{1}{2x}-7\)
\(\left(4x-1\right)+\sqrt{x^2+1}=2x^2+2x+1\)
\(\dfrac{\sqrt{-3x^2+x+4}+2}{x}< 2\)
Gpt \(\dfrac{3x}{x^2-4x+7}+\dfrac{2x}{x^2-6x+7}=2\)
gpt:
1, (17-6x)\(\sqrt{3x-5}\) + (6x-7)\(\sqrt{7-3x}\) =2 + 8\(\sqrt{36x-9x^2-35}\)
2, \(\left(\dfrac{x-1}{x+2}\right)^2-\dfrac{15}{x^2-4}+4\left(\dfrac{x+1}{x-2}\right)^2=5\)
Giải phương trình:
1. \(\sqrt{2x^2+4x+7}=x^4+4x^3+3x^2-2x-7\)
2. \(\dfrac{4}{x}+\sqrt{x-\dfrac{1}{x}}=x+\sqrt{2x-\dfrac{5}{x}}\)
3. \(\dfrac{6-2x}{\sqrt{5-x}}+\dfrac{6+2x}{\sqrt{5+x}}=\dfrac{8}{3}\)
4. \(x^2+1-\left(x+1\right)\sqrt{x^2-2x+3}=0\)
5. \(2\sqrt{2x+4}+4\sqrt{2-x}=\sqrt{9x^2+16}\)
6. \(\left(2x+7\right)\sqrt{2x+7}=x^2+9x+7\)
