A) x² - 8x + 16 = 0 B) x² - akar 3 x - 1 = 0 C) 5x² + 9x = 2
NoviSulistiani1
Bentuk persamaan akar kuadrat adlh ax2 + bx + c = 0 rumus D = b kuadrat - (4 x a x c) a. D = -8 kuadrat - (4 x 1 x 16) = 64 - 64 = 0 b. D = √3 kuadrat - (4 x 1 x (-1)) = √9 + 4 = 3 + 4 = 7 c. 5x2 + 9x = 2 5x2 + 9x - 2 = 0 D = 9 kuadrat - (4 x 5 x (-2)) = 81 + 40 = 121
rumus D = b kuadrat - (4 x a x c)
a. D = -8 kuadrat - (4 x 1 x 16) = 64 - 64 = 0
b. D = √3 kuadrat - (4 x 1 x (-1)) = √9 + 4 = 3 + 4 = 7
c. 5x2 + 9x = 2
5x2 + 9x - 2 = 0
D = 9 kuadrat - (4 x 5 x (-2)) = 81 + 40 =
121