Đáp án:
Giải thích các bước giải:
`(1/4 - x)^2 - 125% = 1 13/16`
`⇔ (1/4 - x)^2=\frac{29}{16}+\frac{125}{100}`
`⇔ (1/4 - x)^2=\frac{29}{16}+\frac{125}{100}`
`⇔ (1/4 - x)^2=49/16`
`⇔ (1/4 - x)^2=(7/4)^2`
`⇔` \(\left[ \begin{array}{l}\dfrac{1}{4}-x=\dfrac{7}{4}\\\dfrac{1}{4}-x=-\dfrac{7}{4}\end{array} \right.\)
`⇔` \(\left[ \begin{array}{l}x=-\dfrac{7}{4}+\dfrac{1}{4}\\x=\dfrac{7}{4}+\dfrac{1}{4}\end{array} \right.\)
`⇔` \(\left[ \begin{array}{l}x=-\dfrac{3}{2}\\x=2\end{array} \right.\)
Vậy `S={-3/2;2}`
