\(2x-\sqrt{x}-3\)
\(=2x+2\sqrt{x}-3\sqrt{x}-3\)
\(=\left(\sqrt{x}+1\right)\left(2\sqrt{x}-3\right)\)
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Chương I - Căn bậc hai. Căn bậc ba
Các câu hỏi tương tự
Giải các phương trình sau:
a) \(x^3-x^2+2x=\sqrt{2x-1}+\sqrt{4x-3}\)
b) \(x^3-x^2+3x+13=4\left(\sqrt{x+3}+\sqrt{3x+1}\right)\)
c) \(x^3-4x^2+6x-1=\sqrt{2x-3}+2\sqrt{x-1}\)
d) \(x^3+4x^2+9x+9=2\sqrt{3x+4}+\sqrt{2x+3}\)
e) \(2x^2-4x+11=2\sqrt{3x-5}+3\sqrt{2x+5}\)
Giải các phương trình sau:
a) \(x^3-x^2+2x=\sqrt{2x-1}+\sqrt{4x-3}\)
b) \(x^3-x^2+3x+13=4\left(\sqrt{x+3}+\sqrt{3x+1}\right)\)
c) \(x^3-4x^2+6x-1=\sqrt{2x-3}+2\sqrt{x-1}\)
d) \(x^3+4x^2+9x+9=2\sqrt{3x+4}+\sqrt{2x+3}\)
e) \(2x^2-4x+11=2\sqrt{3x-5}+3\sqrt{2x+5}\)
Dùng biểu thức liên hợp:
a)sqrt{2x-1}-sqrt{x+1}2x-4. f)3sqrt{x+1}+3sqrt{x-1}4x+1.
b)sqrt{2x^2-3x+10}+sqrt{2x^2-5x+4}x+3.
c)sqrt{x+2}-sqrt{3-x}x^2-6x+9.
d)sqrt{x}-sqrt{x-1}sqrt{x+8}-sqrt{x+3}.
e)sqrt{x^2+x}-sqrt{x^2-3}sqrt{2x^2-x-2}-sqrt{2x^2+1}
Đọc tiếp
Dùng biểu thức liên hợp:
a)\(\sqrt{2x-1}-\sqrt{x+1}=2x-4\). f)\(3\sqrt{x+1}+3\sqrt{x-1}=4x+1\).
b)\(\sqrt{2x^2-3x+10}+\sqrt{2x^2-5x+4}=x+3\).
c)\(\sqrt{x+2}-\sqrt{3-x}=x^2-6x+9\).
d)\(\sqrt{x}-\sqrt{x-1}=\sqrt{x+8}-\sqrt{x+3}.\)
e)\(\sqrt{x^2+x}-\sqrt{x^2-3}=\sqrt{2x^2-x-2}-\sqrt{2x^2+1}\)
Giải các phương trình sau:
a) \(\sqrt{x^2-6x+9}=4-x\)
b) \(\sqrt{2x-2+2\sqrt{2x-3}}+\sqrt{2x+13+8\sqrt{2x-3}}=5\)
giải phương trình
a) \(\frac{\sqrt{x^3+1}}{x+3}+\sqrt{x+1}=\sqrt{x^2-1+1}+\sqrt{x+3}\)
b) \(\sqrt[3]{2x+1}+\sqrt[3]{2x+2}+\sqrt[3]{2x+3}=0\)
1.a) Rút gọn: frac{2x+sqrt{x}-1}{1-x}+frac{2xsqrt{x}+x-sqrt{x}}{1+xsqrt{x}}
b) sqrt[3]{3+sqrt{17}}+sqrt[3]{3-sqrt{17}}
2. Giải phương trình:
a) sqrt{x^2-3x+2}+sqrt{x+3}sqrt{x-2}+sqrt{x^2+2x-3}
b) sqrt{2x^2-9x+4}+3sqrt{2x-1}sqrt{2x^2+21x-11}
c) x^2+2015x-20142sqrt{2017x-2016}
d) sqrt{left(1+x^2right)^3}-4x^31-3x^4
Đọc tiếp
1.a) Rút gọn: \(\frac{2x+\sqrt{x}-1}{1-x}+\frac{2x\sqrt{x}+x-\sqrt{x}}{1+x\sqrt{x}}\)
b) \(\sqrt[3]{3+\sqrt{17}}+\sqrt[3]{3-\sqrt{17}}\)
2. Giải phương trình:
a) \(\sqrt{x^2-3x+2}+\sqrt{x+3}=\sqrt{x-2}+\sqrt{x^2+2x-3}\)
b) \(\sqrt{2x^2-9x+4}+3\sqrt{2x-1}=\sqrt{2x^2+21x-11}\)
c) \(x^2+2015x-2014=2\sqrt{2017x-2016}\)
d) \(\sqrt{\left(1+x^2\right)^3}-4x^3=1-3x^4\)
a) \(\sqrt{x-3}-\sqrt{10-x}\)
b) \(\sqrt{x+4}+\dfrac{2-X}{x^2-16}\)
c) \(\dfrac{\sqrt{2x-3}}{\sqrt{x-4}}\)
d) \(\dfrac{\sqrt{2x-1}}{3x+2}\)
e) \(\dfrac{-2}{\sqrt{x^2+2x+2}}\)
22 tháng 9 2020 lúc 22:50
1, frac{x}{2}-frac{3-x}{3}frac{2x+2}{5}
2,1-frac{3-x}{3}frac{2x+2}{5}-frac{2-x}{4}
3,frac{2}{3}x+1x-5
4, 2x-x2 0
5,frac{4x}{x+1}+frac{x+3}{x}6
6, frac{x-1}{x-3}+frac{2x+2}{x-2}8
7, sqrt{x-1}sqrt{2}
8, sqrt{2x-1}sqrt{x}-4
Đọc tiếp
1, \(\frac{x}{2}-\frac{3-x}{3}=\frac{2x+2}{5}\)
2,1-\(\frac{3-x}{3}=\frac{2x+2}{5}-\frac{2-x}{4}\)
3,\(\frac{2}{3}x+1=x-5\)
4, 2x-x2 =0
5,\(\frac{4x}{x+1}+\frac{x+3}{x}=6\)
6, \(\frac{x-1}{x-3}+\frac{2x+2}{x-2}=8\)
7, \(\sqrt{x-1}=\sqrt{2}\)
8, \(\sqrt{2x-1}=\sqrt{x}-4\)
Giải các phương trình sau. √x2-6x+9=4-x. √x2-10x+25=3-19x. √x2-9+√x2-6x+9=0. √2x-2+2√2x-3+√2x+13+8√2x-3=5
\(\sqrt{2x^2-1}+\sqrt{x^2-3x-2}=\sqrt{2x^2+2x+3}+\sqrt{x^2-x+2}\)