Cho parabol (P): y = - 2x^2, Cho parabol (P): y = 2x^2, Cho parabol (P) : y =2x^2, Cho parabol (P) y = 2x^2, Cho Parabol (P) y = -2x^2, cho Parabol (P): y = 2x^2, Cho Parabol (P): y = -2x^2, Cho parabol(P):y=-2x^2