Algebra 2 problems

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Qnapre123

Mathematics

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Use Descartes' Rule of Signs to state the possible number of positive, real, negative real, and imaginary roots for each function.

1. f(x)= 2x^4 - 3x^3 + 7x^2 - 8x +9

2. f(x)= 2x^3 + 4x^2 - 7x - 8

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