Fungsi Kuadrat
Fungsi Kuadrat Soal !!! 1. y = x^2 - 25 2. y = -x^2 + 7x -12 3. y = - x^2 – 8x + 9 4. y = -2x^2– 7x + 4 5. y = -x^2 + 6x Penyelesaian 1. y =x^2 – 25 y = 0 0 =x^2– 25 (x – 5)(x + 5) x = 5 x + 5 (5,0)(-5,0) x = 0 y = 0^2 – 25 y = -25 (0,25) Xp = - (b/2a) = - (0/2.1) = 0 Yp = -(b^2- 4ac/4a) = -(0^2- 4.1 -25/4.1) = -(0 + 100/4 = -25 (0,-25) 2. ...