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6解一元二次方程式(2x-5)(3x-5)=(2x-5)(5x-2),關於此方程式的根,下列哪一選項是正確的?(A)有一根在2與3之間(B)有一根在0與1之間(C)有一根在1與2之間(D)沒有大於0的
問題詳情
6解一元二次方程式(2x-5)(3x-5)=(2x-5)(5x-2),關於此方程式的根,下列哪一選項是正確的?
(A)有一根在2與3之間
(B)有一根在0與1之間
(C)有一根在1與2之間
(D)沒有大於0的根
參考答案
答案:A
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5.若一元二次方程式x2-7x-a=0中的a為下列何數時,可使此方程式的兩根皆為整數?(A)10(B) 14 (C)16 (D) 18
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7.在一長為(3x+8)、寬為(3x+5)的長方形右下角剪下一長為6、寬為3的小長方形,如圖灰色面積所示。利用此圖因式分解(3x+8)(3x+5)-6x3,則可得下列何式? (A)(3x+8)(3x+
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9.下列一元二次方程式的敘述,何者正確?(A) -2x2-x+1=0有相異兩根。 (B)x2+x+1=0有重根。(C) x2-x-1=0無解。 (D)x2+2x+3=0有相異兩根
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