koolkidwannabe koolkidwannabe
  • 24-03-2022
  • Mathematics
contestada

please help me out, need help asap:) thank you

please help me out need help asap thank you class=

Respuesta :

Аноним Аноним
  • 24-03-2022

Answer:

See below.

Step-by-step explanation:

Solving :-

#1

  • x² - 2x - 15 = 0
  • x = 2 ± √4 - 4(1)(-15) / 2
  • x = 2 ± √64 / 2
  • x = 2 ± 8 / 2
  • x = 1 ± 4
  • x = 5, -3

#2

  • 8x² + 2x - 15 = 0
  • x = -2 ± √4 - 4(8)(-15) / 16
  • x = -2 ± √484 / 16
  • x = -2 ± 22 / 16
  • x = -1 ± 11 / 8
  • x = 5/4, -3/2

They both have the numerator in both solutions to be 5 and -3 respectively. I believe this is because both equations have the constant term, c, to be -15 and 5 and -3 are factors of -15.

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