Saftygate5em2ite Saftygate5em2ite
  • 02-01-2016
  • Mathematics
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Factor the expression x^4 + 6x^2 - 7 completely.

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mfernandez23
mfernandez23 mfernandez23
  • 02-01-2016
So since the first x is raised to the 4th power and the second is raised to the 2nd power and the last number is a negative, you automatically start your factor with (x^2+__)(x^2-__) Then you have to look at factors that would multiply to make -7 and add to make 6, which would be +7 and -1 so you end up with (x^2+7)(x^2-1)
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