Solution of the coordinates of the intersection of the quadratic function y=ax2+bx+c and the X axis: Let y=0 and get ax2+bx+c=0. If the two points for solving the unary quadratic equation ax2+bx+c=0 are x 1 and x2, then the coordinate of the intersection of parabola and X axis is (X 1, 0). o)。 It can be seen that the abscissa of the intersection of parabola y=ax2+bx+c and X axis is actually two of the unary quadratic equation ax2+bx+c=0, so the quadratic function y=ax2+bx+c is closely related to the root of the unary quadratic equation ax2+bx+c=0. When the parabola y=ax2+bx+c intersects the x axis,