Biểu thức ở căn cuối cùng là \(\sqrt{1+3x+3x^2}\) hay \(\sqrt{1+3x-3x^2}\) bạn?
\(x^2-2x+3\)=\(\sqrt{2x^2-x}\)+\(\sqrt{1+3x-3x^2}\)
sorry mình nhầm đề bài
Vậy bạn có thể tham khảo ở đây:
a)\(\sqrt{1-x}\left(x-3x^2\right)=x^3-3x^2+2x+6\)
b)\(x^2+x+12\sqrt{x+1}=36\)
c)\(3x-1+\frac{x-1}{4x}=\sqrt{3x+1}\)
d)\(\sqrt{x^2+12}-3x=\sqrt{x^2+5}-5\)
e)\(4x^2+12+\sqrt{x-1}=4\left(x\sqrt{5x-1}+\sqrt{9-5x}\right)\)
f)\(4x^3-25x^2+43x+x\sqrt{3x-2}=22+\sqrt{3x-2}\)
g)\(2\left(x+1\right)\sqrt{x}+\sqrt{3\left(2x^3+5x^2+4x+1\right)}=5x^3-3x^2+8\)
h)\(\sqrt{x^2+12}-\sqrt{x^2+5}=3x-5\)
i)\(\sqrt{1-3x}-\sqrt[3]{3x-1}=\left|6x-2\right|\)
k)\(\sqrt{2x^3+3x^2-1}=2x^2+2x-x^3-1\)
l)\(\sqrt{x^2+x-2}+x^2=\sqrt{2\left(x-1\right)}+1\)
Giải ptrinh :
\(\dfrac{x^2}{\sqrt{3x-2}}-\sqrt{3x-2}=1-x\)
\(\sqrt{x+1}+2\left(x+1\right)=x-1+\sqrt{1-x}+3\sqrt{1-x^2}\)
\(3x^2+3x+2=\left(x+6\right)\sqrt{3x^2-2x-3}\)
Giải pt : a) \(\sqrt[3]{x^2-1}+x=\sqrt{x^3-1}\)
b) \(\sqrt{2x^2+3x+5}+\sqrt{2x^2-3x+5}=3x\)
c) \(2x^2-11x+2x=3\sqrt[3]{4x-4}\)
giải phương trình sau \(2x^3-2x+\sqrt{2x^3-3x+1}=3x+1+\sqrt[3]{x^2+2}\)
Giải PT a, \(5\sqrt{2x^2+3x+9}=2x^2+3x+3\)
b. \(9-\sqrt{81-7x^3}=\frac{x^3}{2}\)
c. \(x^2+3-\sqrt{2x^2-3x+2}=\frac{3}{2}\left(x+1\right)\)
d. \(\sqrt{9x-2x^2}-9x+2x^2+6=0\)
e. \(\sqrt{x^2+x-1}+\sqrt{x-x^2+1}=x^2-x+2\)
f. \(\sqrt{x^2+x-5}+\sqrt{x-x^2+3}=x^2-3x+4\)
Giai các phương trình sau:
a) \(\sqrt{x-2}+\sqrt{10-x}=x^2-12x+40\)
b) \(\sqrt{x^2+x-1}+\sqrt{x-x^2+1}=x^2-x+2\)
c) \(\sqrt{2x-3}+\sqrt{5-2x}=3x^2-12x+14\)
d) \(x^2-2x+3=\sqrt{2x^2-x}+\sqrt{1+3x-3x^2}\)
\(\sqrt{3x^3+2x^2+2}+\sqrt{-3x^3+x^2+2x-1}=2x^2+2x+2\)
Giải phương trình
1, \(x^2+\left(3-\sqrt{x^2+2}\right)x=1+2\sqrt{x^2+2}\)
2, \(10x^2+3x+1=\sqrt{x^2+3}\left(1+6x\right)\)
3, \(\sqrt{2x-3}+\sqrt{5-2x}=3x^2-12x+14\)
4, \(x^2+2x+15=6\sqrt{4x+5}\)
5, \(\sqrt{2x^2+5x+12}-x=5-\sqrt{2x^2+3x+2}\)
Giải phương trình vô tỉ:
a) \(4x^2-4x-10=\sqrt{8x^2-6x-10}\)
b) \(\sqrt{\left(x+1\right)\left(2-x\right)}=1+2x-2x^2\)
c) \(\sqrt{3x+8+6\sqrt{3x-1}}+\sqrt{3x+8-6\sqrt{3x-1}}=3x+4\)
d) \(2x\sqrt{x^2-x+1}+4\sqrt{3x+1}=2x^2+2x+6\)
