Chương I - Căn bậc hai. Căn bậc ba
Các câu hỏi tương tự
Giải phương trình sau:
a) \(\sqrt{4x+20}-3\sqrt{5+x}+\dfrac{4}{3}\sqrt{9x+45}=6\)
b) \(\dfrac{1}{2}\sqrt{x-1}-\dfrac{3}{2}\sqrt{9x-9}+24\sqrt{\dfrac{x-1}{64}}=-17\)
c) \(2x-x^2+\sqrt{6x^2-12x+7}=0\)
d) \(\left(x+1\right)\left(x+4\right)-3\sqrt{x^2+5x+2}=6\)
Giải các phương trình sau:
a) \(\sqrt{25x^2-9}-2\sqrt{5x+3}=0\)
b) \(\dfrac{\sqrt{x-3}}{\sqrt{2x+1}}=2\)
c) \(\sqrt{x^2-2x+1}+\sqrt{x^2-4x+4}=3\)
a,\(\sqrt{x^2-5x+4}+\sqrt{x+1}=\sqrt{x-2}+\sqrt{x^2-2x-3}\)
b,\(\sqrt{x^2-3x+2}+\sqrt{x^2-4x+3}=2\sqrt{x^2-5x=4}\)
c,\(\sqrt{4x^2+9x+5}+\sqrt{2x^2+x-1}=\sqrt{x^2-1}\)
Tìm điều kiện xác định
\(A=\sqrt{x^2-5x+6}\)
\(B=\dfrac{x}{\sqrt{7x^2-8}}\)
\(C=\sqrt{-9x^2+6x-1}-\dfrac{1}{\sqrt{x^2+x+2}}\)
\(D=\sqrt{3-x^2}-\sqrt{\dfrac{2021}{3x+2}}\)
\(E=\sqrt{\dfrac{3x^2}{2x+1}-1}\)
\(F=\sqrt{25x^2-10x+1}+\dfrac{1}{1-5x}\)
Giải pt : a) \(\sqrt{3x^2-5x+1}-\sqrt{x^2-2}=\sqrt{3\left(x^2-x-1\right)}-\sqrt{x^2-3x+4}\)
b) \(\left(x-1\right)\sqrt{x^2+5}+x=x^2+1\)
c)\(\sqrt{x+2}+2x-10=\sqrt{2x-3}\)
d)\(\sqrt{2x-3}-\sqrt{x}=2x-6\)
e) \(\sqrt{4x^2+5x+1}-2\sqrt{x^2-x+1}=9x-3\)
\(a,x^2-4x-6=\sqrt{2x^2-8x+12}\)
\(b,\sqrt{x+2-4\sqrt{x-2}}+\sqrt{x+7-6\sqrt{x-2}}=1\)
c, \(\sqrt{x+3+4\sqrt{x-1}}+\sqrt{8-6\sqrt{x-1}+x}=1\)
d, \(\sqrt{3-x+x^2}-\sqrt{2+x-x^2=1}\)
e,\(\sqrt{4x-9}+2\sqrt{3x^2-5x+2}=\sqrt{3x-2}+\sqrt{x-1}\)
Tìm x
\(a.\dfrac{\sqrt{5x+7}}{x+3}=4\)
\(b.\left(7+\sqrt{x}\right).\left(8-\sqrt{x}\right)=11+x\)
\(c.\sqrt{2x^2+2-4x}=6\)
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) \(x\sqrt{x-1}+\left(2x+1\right)\sqrt{x+2}+x^3-4x^2+x-6=0\)
b) \(\left(2x+3\right)\sqrt{2x-1}+x\sqrt{x+3}+x^2-5x-3=0\)
c) \(x\sqrt{2x+3}+\left(x+1\right)\sqrt{4x-1}+2\left(x^2-x-1\right)=0\)