Concider the follwing cubic polynomial equestion: x3 + x2 -8/3x +28/27 =0 a. Use the Cardano substitution method to find the associate 'depressed' cubic. b. Use the Del-Ferro/Tartaglia method/formula to solve this depressed cubic.

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A: f(u) = 4u2 + 8u To Find the zeros of the polynomial f(u) and To verify the relationship between the…

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Polynomials

Try substituting 1. You will get 6 and not 0. Try other real values also. What About -2? Let us check.