\(Dk:x\ge5\)
\(\sqrt{4x-20}+\sqrt{x-5}-\frac{1}{3}\sqrt{9x-45}=\sqrt{4\left(x-5\right)}+\sqrt{x-5}-\frac{1}{3}\sqrt{9\left(x-5\right)}=2\sqrt{x-5}+\sqrt{x-5}-\frac{1}{3}.3\sqrt{x-5}=2\sqrt{x-5}=4\Rightarrow\sqrt{x-5}=2\Leftrightarrow x-5=4\Leftrightarrow x=9\left(tmdk\right)\)
Gpt :
1) \(\sqrt{x-1}+\sqrt{4x-4}-\sqrt{25x-25}+2=0\)
2) \(\sqrt{16x+16}-\sqrt{9x+9}+\sqrt{4x+s}+\sqrt{x+1}=16\)
3)\(\sqrt{4x+20}+\sqrt{x+5}-\frac{1}{3}\sqrt{9x+45}=4\)
4) \(\frac{1}{3}\sqrt{2x}-\sqrt{8x}+\sqrt{18x}-10=2\)
1) Tìm x biết
a) \(\sqrt{4x-20}+\sqrt{x-5}-\frac{1}{3}=\sqrt{9x-45}=4\)
b) \(\sqrt{16x-32x}-\sqrt{12x}=\sqrt{3x}+\sqrt{9-18x}\)
c) \(\sqrt{4x-20}-3\sqrt{\frac{x-5}{9}}=\sqrt{1-x}\)
\(\sqrt{4x+20}-5\sqrt{x+5}+\dfrac{4}{3}\sqrt{9x+45}=2\)
* Giải phương trình:
a. \(\sqrt{x^2-6x+9}=2\)
b. \(\sqrt{4x-20}+\sqrt{x-5}-\dfrac{1}{3}\sqrt{9x-45}=4\)
Giải các phương trình sau:
a.\(3\sqrt{18x}-5\sqrt{8x}+4\sqrt{50x}=38\)
b.\(3\sqrt{12x}-2\sqrt{27x}+4\sqrt{3x}=8\)
c.\(\sqrt{4x-20}+\sqrt{x-5}-\dfrac{1}{3}\sqrt{9x-45}=4\)
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 phương trình
\(\sqrt{4x-20}+\sqrt{x-5}-\dfrac{1}{3}\sqrt{9x-45}=4\)
Tìm x biết
a) \(\dfrac{5}{3}\sqrt{15x}-\sqrt{15x}-2=\dfrac{1}{3}\sqrt{15x}\)
b) \(\sqrt{16x+16}-\sqrt{9x+9}+\sqrt{4x+4}+\sqrt{x+1}=16\)
c ) \(\sqrt{4x+20}-3\sqrt{5+x}+\dfrac{4}{3}\sqrt{9x+45}=6\)
d) \(\sqrt{25x-25}-\dfrac{15}{2}\sqrt{\dfrac{x-1}{9}}=6+\sqrt{x+1}\)
e ) \(\sqrt{4x^2+4x+1}=1\)
Giải các phương trình sau
1) \(\sqrt{9x+9}-4\sqrt{\dfrac{x+1}{4}}=5\)
2) \(\sqrt[]{x-5}-2\sqrt{4x-20}-\dfrac{1}{3}\sqrt{9x-45}=12\)
3) \(\sqrt{16x-16}-\sqrt{9x-9}+\sqrt{x-1}=5\)
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