Điền vào chỗ chấm: \({x^2} - 3x + \frac{9}{4} = .................?\)
A.\({x^2} - {\left( {\frac{9}{4}} \right)^2}\)
B.\({\left( {x - \frac{3}{2}} \right)^2}\)
C.\({x^2} - {\left( {\frac{3}{2}} \right)^2}\)
D.\({\left( {\frac{3}{2}} \right)^2} - {x^2}\)
A.\({x^2} - {\left( {\frac{9}{4}} \right)^2}\)
B.\({\left( {x - \frac{3}{2}} \right)^2}\)
C.\({x^2} - {\left( {\frac{3}{2}} \right)^2}\)
D.\({\left( {\frac{3}{2}} \right)^2} - {x^2}\)
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Hóa Học lớp 12
