Question

2x²+3x-9=0 formula general ​

Answer 1

Respuesta:

b = 3 C = -9

x = -b ± √b² - 4ac / 2a

x = -3± √3²-4 (2) (-9)/ 2 (2)

x = -3± √9-(-72)/ 4

x = -3± √9+ 72/4

x = -3± √81/4

x = -3 + 9/4

x1 = -3 + 9/4 = 6/4 = 3/2

x2 = -3 - 9/4 = -12/4 = -3

Comprobación

2x² + 3x - 9=0

2(3/2)² + + 3(3/2) - 9 = 0

2 (9/4) + 9/2-9 = 0

9/29/2 - 9=0