tbogard0001
contestada

What are the x-intercepts of the graph of the function below?
y = x^2 – 3x - 28

A. (-7,0) and (-4,0)
B. (7,0) and (-4,0)
C. (7,0) and (4,0)
D. (-7,0) and (4.0)

Respuesta :

CassandraDiaz
I think the answer might be
B). (7,0) &(-4,0)

Correct me if I’m wrong please❤️
wegnerkolmp2741o

Answer:

The x intercepts are (7,0) and (-4,0)

Step-by-step explanation:

y = x^2 – 3x - 28

Set y=0

0 = x^2 – 3x - 28

Factor.  What 2 numbers multiply to -28 and add to -3

-7*4 = -28

-7+4 = -3

0 = (x-7)(x+4)

Using the zero product property

0 = (x-7)      0 = x+4

x=7              x = -4

The x intercepts are (7,0) and (-4,0)

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