北师大版数学九上花边有多宽同步测试内容摘要:
项是 __________. ax2+5=(x+2)(x- 1)是关于 x 的一元二次方程,则 a__________. x 的方程 (m- 4)x2+(m+4)x+2m+3=0,当 m__________时,是一元二次方程,当m__________时,是一元 一次方程 . 三、选择题 ,不是一元 二次方程的是 +7=0 +2 3 x+1=0 +x1 +4=0 +(1+x) 2 +1=0 x2- 2(3x- 2)+(x+1)=0 的一般形式是 - 5x+5=0 +5x+5=0 +5x- 5=0 +5=0 7x2- 2x=0 的二次项、一次项、常数项依次是 ,2x,0 ,- 2x,无常数项 ,0,2x ,- 2x,0[来 x2- 3 =( 3 - 2 )x 化为一般形式,它的各项系数之和可能是 A. 2 B.-。北师大版数学九上花边有多宽同步测试
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