jordencash77
jordencash77 jordencash77
  • 21-06-2020
  • Mathematics
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The roots of the function f(x) = x2 – 2x – 3 are shown. What is the missing number?

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wegnerkolmp2741o
wegnerkolmp2741o wegnerkolmp2741o
  • 21-06-2020

Answer:

see below

Step-by-step explanation:

f(x) = x^2 – 2x – 3

To find the roots, set the equation equal to zero

0  = x^2 – 2x – 3

Factor, what two numbers multiply to -3 and add to -2

-3 * 1 = -3

-3 + 1 = -2

0 = (x-3)( x+1)

Using the zero product property

x-3 =0   x+1 =0

x=3          x=-1

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