TEKNIK INFORMATIKA

SOAL BERIKUT 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.      y = -x^2 + 7x – 12 y = 0 0 = x^2 + 7x – 12 (-x + 4 ) (x – 3) x = 4 x = 3                (4, 0) (3, 0) x = 0 y = 0^2 +7(0) – 12 y = -12 (0, -12) Xp      = -(b/2a) ...