jennabnicole2002 jennabnicole2002
  • 06-04-2020
  • Mathematics
contestada

1. Which of the following are solutions to x2 - 4x - 5 = 0? List all correct answers
a. -5
c. -1
b. 5
d. 1

Respuesta :

wegnerkolmp2741o
wegnerkolmp2741o wegnerkolmp2741o
  • 06-04-2020

Answer:

c. -1

b. 5

Step-by-step explanation:

x^2 - 4x - 5 = 0

Factor

What two numbers multiply to -5 and add to -1

-5*1 = -5

-5+1 = -4

(x-5) (x+1) =0

Using the zero product property

x-5 =0      x+1 =0

x=5            x=-1

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