2. Extend relevant knowledge points
As shown in the figure, in the plane rectangular coordinate system, the parabola Y is equal to eight fifths of the square of the root number two X plus bx plus C, passing through point A, brackets, a third comma and ending in zero.
3. Standardize typesetting, enrich the content, and pass the certification more easily.
4. Supplementary reference materials (nothing can be ignored ~)