ariannamacias0086
ariannamacias0086 ariannamacias0086
  • 25-04-2021
  • Mathematics
contestada

Select the two values of x that are roots of this equation.
2x^2 — 11x + 15 = 0

A. x = 5
B. x = 3
C. x = 6
D. x = 5/2

Select the two values of x that are roots of this equation 2x2 11x 15 0 A x 5 B x 3 C x 6 D x 52 class=

Respuesta :

tankisfun97 tankisfun97
  • 25-04-2021

Answer:

3 ; 5/2

Step-by-step explanation:

Δ= 121 - 120 = 1

x1 = (11 + 1)/4 = 3

x2 = (11-1)/4 =5/2

Answer Link
botikoti24
botikoti24 botikoti24
  • 25-04-2021

Answer:

Step-by-step explanation:

We can use the formula of delta.(you can see it in the picture down below)

So:

a=2

b=-11

c=15

So delta=-11 x -11 - 4*2*15

delta=121-120

delta=1

x1=-(-11)+1/4

x1=11+1/4

x1=12/4

x1=3

x2=11-1/4

x2=10/4

x2=5/2

Ver imagen botikoti24
Answer Link

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