Current location - Training Enrollment Network - Mathematics courses - Analysis of the 20 12 Middle School Entrance Examination of One Model Mathematics in Dongcheng District 17. ask for advice
Analysis of the 20 12 Middle School Entrance Examination of One Model Mathematics in Dongcheng District 17. ask for advice
When y=0, x=-n and x=2. Because the parabola y=(x+n)(x-2) intersects the X axis at point A and point B, where n >；; 0, point A is to the left of point B, so the coordinate of point A is (-n, 0).