2 câu trả lời
` |x^2. |x + 3/4| | = x^2 `
` <=> x^2 . |x + 3/4| = x^2 `
` <=> |x + 3/4| = 1 `
` <=> ` \(\left[ \begin{array}{l}x+\frac{3}{4}=1\\x+\frac{3}{4}=-1\end{array} \right.\)
` <=> ` \(\left[ \begin{array}{l}x=\frac{1}{4}\\x=-\frac{7}{4}\end{array} \right.\)
