x^2 + 5/2x + (5/4)^2 = -3/2 + 25/16
(x + 5/4)^2 = 1/16
x + 5/4 = +-1/4
x1 = -5/4 + 1/4 x2 = -5/4 -1/4
= -1 = -3/2
- Cara ketiga Rumus a-b-c
x = -b +-VD
________ d engan D = b^2 - 4ac
2a
2x^2 + 5x + 3 = 0
a b c
D = 5^2 -4.2.3
= 25 - 24
= 1