anonymous
  • anonymous
which of the following is an x-intercept of the function, f(x)= x^3-5x^2-8x+48 A.4 B.-2 C.-4 D.2
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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welshfella
  • welshfella
at an x intercept f(x) = 0 so plug in the options into the expression for f(x) and see which one works out to be 0
welshfella
  • welshfella
for example for x = 4 we get (4)^3 - 5(4)^2 - 8(4) + 48 = ?
welshfella
  • welshfella
64 - 80 -32 + 48 = ?

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welshfella
  • welshfella
does that come to 0? if it does you have your answer
anonymous
  • anonymous
I did all four and none of them equal zero unless I did it wrong
anonymous
  • anonymous
92 44 -28 52
anonymous
  • anonymous
those were my answers...
welshfella
  • welshfella
64 - 80 - 32 + 48 = 64 + 48 - 80 - 32 = 112 - 112 = 0
welshfella
  • welshfella
A is the correct option
anonymous
  • anonymous
ok thank you. I couldn't get it
welshfella
  • welshfella
yw
welshfella
  • welshfella
with something like this it might be easier to do all additions first then subtractions last

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