2x² + 5x - 3 = 0 (Po-Shen Loh)

 2x² + 5x - 3 = 0

Po-Shen Loh

Dividindo a equação por 2

x² + 5x/2 - 3/2 = 0

b/2 => 5x/4

(5/4)² = 25/16 + 3/2

25/16 + 24/16 = 49/16

SQRT (49/16) = 7/4

5/4 +-SQRT (49/16) =

-5/4 + 7/4 = 1/2

-5/4 - 7/4 = -12/4 = -3

Por Bhaskara

2x² + 5x - 3 = 0

a = 2

b = 5

c = -3

Delta = b² - 4ac

Delta = 25 - 4*2*(-3) = 49

x = (-5+-7)/4

x1 =1/2

x2=-3