dhoshikasri dhoshikasri
  • 25-05-2019
  • Mathematics
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2x3+x2-13x+6 find zeroes , verify​

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sqdancefan
sqdancefan sqdancefan
  • 25-05-2019

Answer:

  the zeros are x ∈ {-3, 1/2, 2}

Step-by-step explanation:

A graphing calculator shows where the zeros are. (See attached)

These suggest factors of (x +3)(x -2)(2x -1). To verify these are the factors, we can multiply this out to get ...

  = (x^2 +x -6)(2x -1)

  = 2x^2 +2x^2 -12x -x^2 -x +6

  = 2x^3 +x^2 -13x +6 . . . . same as the original expression

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