ĐKXĐ \(-\frac{1}{3}\le x\le2\)
<=>\(2-x=9-6\sqrt{3x+1}+3x+1\)
<=>\(6\sqrt{3x+1}=4x+8\)
<=>\(3\sqrt{3x+1}=2x+4\)
<=>\(9\left(3x+1\right)=4x^2+16x+16\)
<=>\(4x^2-11x+7=0\)
<=>\(\left(4x-7\right)\left(x-1=0\right)\)
<=>\(x=\frac{7}{4};x=1\)
Nhớ tick mình nha bạn,cảm ơn nhiều.