amberduone32
amberduone32 amberduone32
  • 02-07-2019
  • Mathematics
contestada

What is the discriminant of the polynomial below?
2х2 + 4x - 9
А. 88
в. 22
с. -56
D. -2

Respuesta :

harpazo
harpazo harpazo
  • 02-07-2019

Let d = discriminant

d = b^2 - 4ac

Let a = 2, b = 4 and c = -9

We now plug and chug.

d = (4)^2 - 4(2)(-9)

d = 16 - 8(-9)

d = 16 + 72

d = 88

Answer Link
wegnerkolmp2741o
wegnerkolmp2741o wegnerkolmp2741o
  • 02-07-2019

Answer:

А. 88

Step-by-step explanation:

2х^2 + 4x - 9

This is in the form

ax^2 +bx +c

where a=2 b=4 and c=-9

The discriminant is

b^2 -4ac

Substituting into the equation

4^2 -4(2) (-9)

16 - (-72)

16+72

88

Answer Link

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