ĐK : tự làm :
Đặt \(\sqrt{2x+3x-\sqrt{x+2}}=a;\sqrt{2x+4+\sqrt{x+2}}=b\)
TA có : \(b^2-a^2=1+2\sqrt{x+2}=a+b\)
=> b - a = 1 => b = 1 + a
=> \(\sqrt{2x+4+\sqrt{x+2}}=1+\sqrt{2x+3-\sqrt{x+2}}\)
=> \(2x+4+\sqrt{x+2}=1+2x+3-\sqrt{x+2}+2\sqrt{2x+3-\sqrt{x+2}}\)
=> \(2\sqrt{x+2}=2\sqrt{2x+3-\sqrt{x+2}}\)
=> \(x+2=2x+3-\sqrt{x+2}\)
=> \(\sqrt{x+2}=x+1\)
GPT
\(\sqrt[]{2x+3+\sqrt{x+2}}+\sqrt[]{2x+2-\sqrt{2+x}}=1+2\sqrt{x+2}\)
gpt:
\(\sqrt{2x^2-1}+\sqrt{x^2-3x-2}=\sqrt{2x^2+2x+3}+\sqrt{x^2-x+2}\)
GPT :
\(\sqrt[4]{2x^3+x^2-2x+8}+\sqrt[4]{3x^3+x^2-2x+10}=2\sqrt[4]{x^2-2x+4}\)
Gpt: \(\sqrt{x+5}+\sqrt{3-x}-2\left(\sqrt{15-2x-x^2}+1\right)=0\)
GPT:
1, \(6x^2+10x-92+\sqrt{\left(x+70\right)\left(2x^2+4x+16\right)}=0\)
2,\(x+3+\sqrt{1-x^2}=3\sqrt{x+1}+\sqrt{1-x}\)
GPT : \(\sqrt{\left|x+1\right|}+\sqrt[4]{x^2-2x+5}=2\sqrt[4]{x^2+3}\)
gpt:\(\sqrt{3x^2+6x+4}+\sqrt{2x^2+4x+11}=\left(1-x\right)\left(x+3\right)\)
\(\sqrt{3x^2+6x+7}+\sqrt{5x^2+10x+21}=5-x^2-2x\)
\(\sqrt{x^2-x+2}+\sqrt{x^2-3x+6}=2x\)
gpt:
\(x^4-2x^3+x=\sqrt{(x^2-x).2}\)
\(x(5x^3+2)-2(\sqrt{2x+1}-1)=0\)
\(\sqrt{x+\frac{3}{x}}=\frac{x^2-7}{2x+2}\)
GPT:
\(\sqrt{1-x}+\sqrt{1+x}+2\sqrt{1-x^2}=4\)
\(x^4\sqrt{x+3}=2x^4-x+1\)
\(\sqrt{x-1}+\sqrt{2x-1}=5\)
