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15 December, 15:56

Brianna is graphing the function f (x) = x2 + 6x + 5. What x-intercepts should Brianna use to graph f (x) ?

-5 and - 1

-5 and 1

-1 and 5

1 and 5

+5
Answers (1)
  1. 15 December, 16:22
    0
    The answer is

    -5 and - 1

    proof

    for f (x) = x2 + 6x + 5, f (-5) = 25-30+5 = 0, x=-5, y=0

    f (-1) = 1-6+5=6-6=0, x=-1, and y=0

    the x-intercepts are - 5 and - 1
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