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The yearly profit of a company in thousands of dollars can be modeled by P(t) = t4 − 5t2 + 4, where t is the number of years since 2000. Factor to find the years in which the profit was 0.

Respuesta :

MathisLif3
(t^2-1)(t^2-4)
so t=(-1, 1, -2, 2)
Time moves in one direction to our knowledge so disregard negative values.
depending on context, 1st and 2nd yr

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