ksweetpea2001org4nt ksweetpea2001org4nt
  • 20-01-2020
  • Mathematics
contestada

What are the x-intercepts of the graph of the equation y = x² + 4x -5 ?
-5 and 1
5 and 1
5 and -1
-5 and 0

Respuesta :

HamK
HamK HamK
  • 20-01-2020

Answer: -5 and 1

Step-by-step explanation:

x-intercept means where a certain equation touches the x-axis. At this point the value of y will be 0.

So, put y = 0 in y = x² + 4x -5

0 = x² + 5x - x - 5

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

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

Either,

x - 1 = 0

x = 1

Or,

x + 5 = 0

x = -5

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