giải pt

a) \(\sqrt{x^2+x+1}+\sqrt{3x^2+3x+2}=\sqrt{5x^2+5x-1}\)

b) \(\sqrt{x^2+x+4}+\sqrt{x^2+x+1}=\sqrt{2x^2+2x+9}\)

c) \(\sqrt{3x^2-5x+7}+\sqrt{3x^2-7x+2}=3\)

d) \(\sqrt{x^2+3x+2}=\sqrt{2x^2+9x+7}-\sqrt{x^2+6x+5}\)

giải pt

a) \(\sqrt{4-x}-\sqrt{x+1}=\sqrt{1+2x}\)

b) \(5x-\sqrt{5x+1}\left(\sqrt{14x+7}-\sqrt{2x+3}\right)+1=0\)

c) \(\sqrt[3]{2-2x}=1-\sqrt{2x-1}\)

d) \(\sqrt{5-4x}+\sqrt[3]{x+7}=3\)