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Question

( 3/4 - x ) mũ 2 = 25/16

( 2x - 1/4 ) mũ 2 = 9/25

Answer 1

a, \((\frac{3}{4}-x)^2=\frac{25}{16}\)

\(\Leftrightarrow (\frac{3}{4}-x)^2=(\frac{5}{4})^2\)

\(\Leftrightarrow (\frac{3}{4}-x)^2-(\frac{5}{4})^2=0\)

\(\Leftrightarrow (\frac{3}{4}-x-\frac{5}{4})-(\frac{3}{4}-x+\frac{5}{4})=0\)

b, \((2x -\frac{1}{4})^2=\frac{9}{25}\)

\(\Leftrightarrow (2x -\frac{1}{4})^2=(\frac{3}{5})^2\)

\(\Leftrightarrow (2x -\frac{1}{4})^2-(\frac{3}{5})^2=0\)

\(\Leftrightarrow (2x-\frac{1}{4}-\frac{3}{5})-(2x-\frac{1}{4}+\frac{3}{5})=0\)

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